[FIX] it should be possible to delete quants after the revaluation has been posted.

stock_inventory_revaluation/models/stock_inventory_revaluation.py

@@ -425,7 +425,7 @@ class StockInventoryRevaluationQuant(models.Model):
                                      readonly=True)
 
     quant_id = fields.Many2one('stock.quant', 'Quant', required=True,
-                               readonly=True,
+                               readonly=True, ondelete='cascade',
                                domain=[('product_id.type', '=', 'product')])
 
     product_id = fields.Many2one('product.product', 'Product',

stock_inventory_revaluation/tests/test_stock_inventory_revaluation.py

@@ -234,6 +234,12 @@ class TestStockInventoryRevaluation(TransactionCase):
                                  'Incorrect inventory revaluation for '
                                  'type Price Change.')
 
+        quants = self.env['stock.quant'].search([('product_id', '=',
+                                                 self.product_real_1.id)])
+
+        # We should be able to delete the quants afterwards
+        quants.with_context(force_unlink=True).unlink()
+
     def create_inventory_revaluation_price_change_average(self):
         revaluation_type = 'price_change'
         # Create an Inventory Revaluation for average cost product