[FIX] models: new() cannot not trigger any recomputation

Set the flag `validate=False` to prevent `convert_to_cache` on x2many
fields from triggering recomputations with command 1 (update).

odoo/fields.py

@@ -2329,7 +2329,10 @@ class _RelationalMulti(_Relational):
                         ids.add(comodel.new(command[2], ref=command[1]).id)
                     elif command[0] == 1:
                         line = browse(command[1])
-                        line.update(command[2])
+                        if validate:
+                            line.update(command[2])
+                        else:
+                            line._update_cache(command[2], validate=False)
                         ids.add(line.id)
                     elif command[0] in (2, 3):
                         ids.discard(browse(command[1]).id)

odoo/models.py

@@ -5018,7 +5018,7 @@ Fields:
         if origin is not None:
             origin = origin.id
         record = self.browse([NewId(origin, ref)])
-        record._update_cache(values)
+        record._update_cache(values, validate=False)
         return record
 
     @property
@@ -5596,7 +5596,7 @@ Fields:
 
         # store changed values in cache, and update snapshot0
         for name, value in changed_x2many.items():
-            record._update_cache({name: value})
+            record._update_cache({name: value}, validate=False)
             snapshot0.fetch(name)
 
         # determine which field(s) should be triggered an onchange