19.0 vanilla

odoo-bringout-oca-ocb-mrp_subcontracting/mrp_subcontracting/models/mrp_unbuild.py

@@ -0,0 +1,15 @@
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+from odoo import models, _
+from odoo.exceptions import UserError
+
+
+class MrpProduction(models.Model):
+    _inherit = 'mrp.production'
+
+    def button_unbuild(self):
+        if self.subcontractor_id:
+            raise UserError(_(
+                "You can't unbuild a subcontracted Manufacturing Order.",
+            ))
+        return super().button_unbuild()