Always build contract checksum for versioned model

core/dbt/contracts/graph/nodes.py

@@ -625,6 +625,11 @@ def build_contract_checksum(self):
         # We don't need to construct the checksum if the model does not
         # have contract enforced, because it won't be used.
         # This needs to be executed after contract config is set
+
+        # Should we make this a no-op, if the checksum already exists?
+        if self.contract.checksum is not None:
+            pass
+
         if self.contract.enforced is True:
             contract_state = ""
             # We need to sort the columns so that order doesn't matter

core/dbt/parser/schemas.py

@@ -784,6 +784,8 @@ def parse_patch(self, block: TargetBlock[UnparsedModelUpdate], refs: ParserRef)
 
                 # Includes alias recomputation
                 self.patch_node_config(versioned_model_node, versioned_model_patch)
+                # Need to reapply this here, in the case that 'contract: {enforced: true}' was during config-setting
+                versioned_model_node.build_contract_checksum()
                 source_file.append_patch(
                     versioned_model_patch.yaml_key, versioned_model_node.unique_id
                 )