Contributors

Personally if they are meant to have lots I wouldn't null them. Just create them new ones and set.

Now as for quants there are 2 choices (these are v14) - first backport the Odoo way with a server action like this (if database is small) or the second is the same thing just specific to products.

Model Server Action

quants = env['stock.quant'].sudo().search([])

move_line_ids = []
move_line_to_recompute_ids = []

logging = ''

for quant in quants:

    move_lines = env['stock.move.line'].search([
        ('product_id', '=', quant.product_id.id),
        ('location_id', '=', quant.location_id.id),
        ('lot_id', '=', quant.lot_id.id),
        ('package_id', '=', quant.package_id.id),
        ('owner_id', '=', quant.owner_id.id),
        ('product_qty', '!=', 0),
        ])

    move_line_ids += move_lines.ids
    reserved_on_move_lines = sum(move_lines.mapped('product_qty'))
    move_line_str = str.join(', ', [str(move_line_id) for move_line_id in move_lines.ids])

    if quant.location_id.should_bypass_reservation():
        # If a quant is in a location that should bypass the reservation, its `reserved_quantity` field
        # should be 0.
        if quant.reserved_quantity != 0:
            logging += "Problematic quant found: %s (quantity: %s, reserved_quantity: %s)\n" % (quant.id, quant.quantity, quant.reserved_quantity)
            logging += "its `reserved_quantity` field is not 0 while its location should bypass the reservation\n"
            if move_lines:
                logging += "These move lines are reserved on it: %s (sum of the reservation: %s)\n" % (move_line_str, reserved_on_move_lines)
            else:
                logging += "no move lines are reserved on it, you can safely reset its `reserved_quantity` to 0\n"
            logging += '******************\n'
            quant.write({'reserved_quantity': 0})
    else:
        # If a quant is in a reservable location, its `reserved_quantity` should be exactly the sum
        # of the `product_qty` of all the partially_available / assigned move lines with the same
        # characteristics.

        if quant.reserved_quantity == 0:
            if move_lines:
                logging += "Problematic quant found: %s (quantity: %s, reserved_quantity: %s)\n" % (quant.id, quant.quantity, quant.reserved_quantity)
                logging += "its `reserved_quantity` field is 0 while these move lines are reserved on it: %s (sum of the reservation: %s)\n" % (move_line_str, reserved_on_move_lines)
                logging += '******************\n'
                move_lines.with_context(bypass_reservation_update=True).sudo().write({'product_uom_qty': 0})
                move_line_to_recompute_ids += move_lines.ids
        elif quant.reserved_quantity < 0:
            logging += "Problematic quant found: %s (quantity: %s, reserved_quantity: %s)\n" % (quant.id, quant.quantity, quant.reserved_quantity)
            logging += "its `reserved_quantity` field is negative while it should not happen\n"
            quant.write({'reserved_quantity': 0})
            if move_lines:
                logging += "These move lines are reserved on it: %s (sum of the reservation: %s)\n" % (move_line_str, reserved_on_move_lines)
                move_lines.with_context(bypass_reservation_update=True).sudo().write({'product_uom_qty': 0})
                move_line_to_recompute_ids += move_lines.ids
            logging += '******************\n'
        else:
            if reserved_on_move_lines != quant.reserved_quantity:
                logging += "Problematic quant found: %s (quantity: %s, reserved_quantity: %s)\n" % (quant.id, quant.quantity, quant.reserved_quantity)
                logging += "its `reserved_quantity` does not reflect the move lines reservation\n"
                logging += "These move lines are reserved on it: %s (sum of the reservation: %s)\n" % (move_line_str, reserved_on_move_lines)
                logging += '******************\n'
                move_lines.with_context(bypass_reservation_update=True).sudo().write({'product_uom_qty': 0})
                move_line_to_recompute_ids += move_lines.ids
                quant.write({'reserved_quantity': 0})
            else:
                if any(move_line.product_qty < 0 for move_line in
                       move_lines):
                    logging += "Problematic quant found: %s (quantity: %s, reserved_quantity: %s)\n" % (quant.id, quant.quantity, quant.reserved_quantity)
                    logging += "its `reserved_quantity` correctly reflects the move lines reservation but some are negatives\n"
                    logging += "These move lines are reserved on it: %s (sum of the reservation: %s)\n" % (move_line_str, reserved_on_move_lines)
                    logging += '******************\n'
                    move_lines.with_context(bypass_reservation_update=True).sudo().write({'product_uom_qty': 0})
                    move_line_to_recompute_ids += move_lines.ids
                    quant.write({'reserved_quantity': 0})

move_lines = env['stock.move.line'].search([('product_id.type', '=',
        'product'), ('product_qty', '!=', 0), ('id', 'not in',
        move_line_ids)])

move_lines_to_unreserve = []

for move_line in move_lines:
    if not move_line.location_id.should_bypass_reservation():
        logging += "Problematic move line found: %s (reserved_quantity: %s)\n" % (move_line.id, move_line.product_qty)
        logging += "There is no exiting quants despite its `reserved_quantity`\n"
        logging += '******************\n'
        move_lines_to_unreserve.append(move_line.id)
        move_line_to_recompute_ids.append(move_line.id)

if len(move_lines_to_unreserve) > 0:
    env.cr.execute("""
            UPDATE stock_move_line SET product_uom_qty = 0, product_qty = 0 WHERE id in %s ;
        """
                   % (tuple(move_lines_to_unreserve), ))

if logging:
    env['ir.logging'].sudo().create({
        'name': 'Unreserve stock.quant and stock.move.line',
        'type': 'server',
        'level': 'DEBUG',
        'dbname': env.cr.dbname,
        'message': logging,
        'func': '_update_reserved_quantity',
        'path': 'addons/stock/models/stock_quant.py',
        'line': '0',
    })

if move_line_to_recompute_ids:
    env['stock.move.line'].browse(move_line_to_recompute_ids).move_id._recompute_state()

Or if database is large/many users I create a Server Action on Product secured to inventory manager with an action

if records:
    quants = env['stock.quant'].sudo().search([('product_id', 'in', records.ids)])
   
    move_line_ids = []
    move_line_to_recompute_ids = []
   
    logging = ''
   
    for quant in quants:
   
        move_lines = env['stock.move.line'].search([
            ('product_id', '=', quant.product_id.id),
            ('location_id', '=', quant.location_id.id),
            ('lot_id', '=', quant.lot_id.id),
            ('package_id', '=', quant.package_id.id),
            ('owner_id', '=', quant.owner_id.id),
            ('product_qty', '!=', 0),
            ])
   
        move_line_ids += move_lines.ids
        reserved_on_move_lines = sum(move_lines.mapped('product_qty'))
        move_line_str = str.join(', ', [str(move_line_id) for move_line_id in move_lines.ids])
   
        if quant.location_id.should_bypass_reservation():
            # If a quant is in a location that should bypass the reservation, its `reserved_quantity` field
            # should be 0.
            if quant.reserved_quantity != 0:
                logging += "Problematic quant found: %s (quantity: %s, reserved_quantity: %s)\n" % (quant.id, quant.quantity, quant.reserved_quantity)
                logging += "its `reserved_quantity` field is not 0 while its location should bypass the reservation\n"
                if move_lines:
                    logging += "These move lines are reserved on it: %s (sum of the reservation: %s)\n" % (move_line_str, reserved_on_move_lines)
                else:
                    logging += "no move lines are reserved on it, you can safely reset its `reserved_quantity` to 0\n"
                logging += '******************\n'
                quant.write({'reserved_quantity': 0})
        else:
            # If a quant is in a reservable location, its `reserved_quantity` should be exactly the sum
            # of the `product_qty` of all the partially_available / assigned move lines with the same
            # characteristics.
   
            if quant.reserved_quantity == 0:
                if move_lines:
                    logging += "Problematic quant found: %s (quantity: %s, reserved_quantity: %s)\n" % (quant.id, quant.quantity, quant.reserved_quantity)
                    logging += "its `reserved_quantity` field is 0 while these move lines are reserved on it: %s (sum of the reservation: %s)\n" % (move_line_str, reserved_on_move_lines)
                    logging += '******************\n'
                    move_lines.with_context(bypass_reservation_update=True).sudo().write({'product_uom_qty': 0})
                    move_line_to_recompute_ids += move_lines.ids
            elif quant.reserved_quantity < 0:
                logging += "Problematic quant found: %s (quantity: %s, reserved_quantity: %s)\n" % (quant.id, quant.quantity, quant.reserved_quantity)
                logging += "its `reserved_quantity` field is negative while it should not happen\n"
                quant.write({'reserved_quantity': 0})
                if move_lines:
                    logging += "These move lines are reserved on it: %s (sum of the reservation: %s)\n" % (move_line_str, reserved_on_move_lines)
                    move_lines.with_context(bypass_reservation_update=True).sudo().write({'product_uom_qty': 0})
                    move_line_to_recompute_ids += move_lines.ids
                logging += '******************\n'
            else:
                if reserved_on_move_lines != quant.reserved_quantity:
                    logging += "Problematic quant found: %s (quantity: %s, reserved_quantity: %s)\n" % (quant.id, quant.quantity, quant.reserved_quantity)
                    logging += "its `reserved_quantity` does not reflect the move lines reservation\n"
                    logging += "These move lines are reserved on it: %s (sum of the reservation: %s)\n" % (move_line_str, reserved_on_move_lines)
                    logging += '******************\n'
                    move_lines.with_context(bypass_reservation_update=True).sudo().write({'product_uom_qty': 0})
                    move_line_to_recompute_ids += move_lines.ids
                    quant.write({'reserved_quantity': 0})
                else:
                    if any(move_line.product_qty < 0 for move_line in
                           move_lines):
                        logging += "Problematic quant found: %s (quantity: %s, reserved_quantity: %s)\n" % (quant.id, quant.quantity, quant.reserved_quantity)
                        logging += "its `reserved_quantity` correctly reflects the move lines reservation but some are negatives\n"
                        logging += "These move lines are reserved on it: %s (sum of the reservation: %s)\n" % (move_line_str, reserved_on_move_lines)
                        logging += '******************\n'
                        move_lines.with_context(bypass_reservation_update=True).sudo().write({'product_uom_qty': 0})
                        move_line_to_recompute_ids += move_lines.ids
                        quant.write({'reserved_quantity': 0})
   
    move_lines = env['stock.move.line'].search([('product_id.type', '=',
            'product'), ('product_qty', '!=', 0), ('id', 'not in',
            move_line_ids), ('product_id', 'in', records.ids)])
   
    move_lines_to_unreserve = []
   
    for move_line in move_lines:
        if not move_line.location_id.should_bypass_reservation():
            logging += "Problematic move line found: %s (reserved_quantity: %s)\n" % (move_line.id, move_line.product_qty)
            logging += "There is no exiting quants despite its `reserved_quantity`\n"
            logging += '******************\n'
            move_lines_to_unreserve.append(move_line.id)
            move_line_to_recompute_ids.append(move_line.id)
   
    if len(move_lines_to_unreserve) > 0:
        env.cr.execute("""
                UPDATE stock_move_line SET product_uom_qty = 0, product_qty = 0 WHERE id in %s ;
            """
                       % (tuple(move_lines_to_unreserve), ))
   
    if logging:
        env['ir.logging'].sudo().create({
            'name': 'Unreserve stock.quant and stock.move.line',
            'type': 'server',
            'level': 'INFO',
            'dbname': env.cr.dbname,
            'message': logging,
            'func': '_update_reserved_quantity',
            'path': 'addons/stock/models/stock_quant.py',
            'line': '0',
        })
   
    if move_line_to_recompute_ids:
        env['stock.move.line'].browse(move_line_to_recompute_ids).move_id._recompute_state()

On Fri, 7 Jan 2022, 11:27 pm Carmen Bianca Bakker, <carmen@coopiteasy.be> wrote:

Hello,

Bedankt Tom, you are right. I have exclusively updated stock_quant from
a previous backup, and I get effectively the same behaviour as I did
when I updated both. That helps narrow down my research a lot---thank
you.

With kindness,
Carmen

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Hello,

Bedankt Tom, you are right. I have exclusively updated stock_quant from
a previous backup, and I get effectively the same behaviour as I did
when I updated both. That helps narrow down my research a lot---thank
you.

With kindness,
Carmen

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I have also verified that the quantities in
the inventory have correctly added up (the quantities of bottles that
previously had lots are added to the lot-less bottles).

I think at least for the stock_quant table, this is all you had to verify, and you have, so that's fine.

As for the modification that you did in "stock_move_line", I'm less sure - you're changing history there. I'm also not sure if doing that was really necessary to achieve your goal to make the inventory work again.

If you want to be sure, I would revert the stock move line table to a recent backup, and then do some more testing in a test database if that modification is really necessary.