[FIX] mrp: sequence depending on picking type

In case you have multiple warehouses and/or multiple manufacturing
locations (procurement routes), the same sequence is taken for the
created manufacturing order no matter where it is finally produced.

Closes #17681
opw-748344

addons/mrp/models/mrp_production.py

@@ -269,7 +269,10 @@ class MrpProduction(models.Model):
     @api.model
     def create(self, values):
         if not values.get('name', False) or values['name'] == _('New'):
-            values['name'] = self.env['ir.sequence'].next_by_code('mrp.production') or _('New')
+            if values.get('picking_type_id'):
+                values['name'] = self.env['stock.picking.type'].browse(values['picking_type_id']).sequence_id.next_by_id()
+            else:
+                values['name'] = self.env['ir.sequence'].next_by_code('mrp.production') or _('New')
         if not values.get('procurement_group_id'):
             values['procurement_group_id'] = self.env["procurement.group"].create({'name': values['name']}).id
         production = super(MrpProduction, self).create(values)