fix(ingest): conditionally include env in assertion guid

metadata-ingestion/src/datahub/ingestion/source/dbt/dbt_common.py

@@ -251,14 +251,19 @@ class DBTCommonConfig(StatefulIngestionConfigBase, LineageConfig):
     )
     backcompat_skip_source_on_lineage_edge: bool = Field(
         False,
-        description="Prior to version 0.8.41, lineage edges to sources were directed to the target platform node rather than the dbt source node. This contradicted the established pattern for other lineage edges to point to upstream dbt nodes. To revert lineage logic to this legacy approach, set this flag to true.",
+        description="[deprecated] Prior to version 0.8.41, lineage edges to sources were directed to the target platform node rather than the dbt source node. This contradicted the established pattern for other lineage edges to point to upstream dbt nodes. To revert lineage logic to this legacy approach, set this flag to true.",
     )
 
     incremental_lineage: bool = Field(
         # Copied from LineageConfig, and changed the default.
         default=False,
         description="When enabled, emits lineage as incremental to existing lineage already in DataHub. When disabled, re-states lineage on each run.",
     )
+    include_env_in_assertion_guid: bool = Field(
+        default=False,
+        description="Prior to version 0.9.4.2, the assertion GUIDs did not include the environment. If you're using multiple dbt ingestion "
+        "that are only distinguished by env, then you should set this flag to True.",
+    )
     stateful_ingestion: Optional[StatefulStaleMetadataRemovalConfig] = pydantic.Field(
         default=None, description="DBT Stateful Ingestion Config."
     )
@@ -684,6 +689,15 @@ def create_test_entity_mcps(
                         "platform": DBT_PLATFORM,
                         "name": node.dbt_name,
                         "instance": self.config.platform_instance,
+                        **(
+                            # Ideally we'd include the env unconditionally. However, we started out
+                            # not including env in the guid, so we need to maintain backwards compatibility
+                            # with existing PROD assertions.
+                            {}
+                            if self.config.env == mce_builder.DEFAULT_ENV
+                            or self.config.include_env_in_assertion_guid
+                            else {"env": self.config.env}
+                        ),
                     }
                 )
             )