high severityMilvus (add_collection_field, insert)
pymilvus.exceptions.MilvusException: (code=109, message=collection schema mismatch[collection=<name>]) during client.insert() after concurrent add_collection_field() operations. Reproduction: Run create/insert script while rapidly adding fields in parallel script.
Root cause
Insert message consumers (pipeline/flowgraph) receive schema updates before processing pending insert messages lacking data for newly added nullable fields via add_field, causing schema validation failure during concurrent operations.
Milvuspymilvusschema mismatchadd_fieldconcurrent insertcode=109