v0.14.21
Summary
LlamaIndex v0.14.21 is a maintenance release that fixes several bugs in the core library, including a KeyError (an error when looking up a value in a data structure that doesn't exist) in the DocumentSummaryIndex deletion function, handling of output formatting errors, and UTF-8 encoding issues in file operations. The release also updates dependencies across many embedding and indexing modules to keep the library's supporting code current.
Solution / Mitigation
Update to llama-index-core version 0.14.21 or later. The fixes are included in this release version, which addresses the KeyError in DocumentSummaryIndex.delete_nodes, ValueError and TypeError from structured output failures, UTF-8 encoding issues in the persistence layer, and the Message Block Buffer Resolution breaking change.
Classification
Affected Vendors
Related Issues
Original source: https://github.com/run-llama/llama_index/releases/tag/v0.14.21
First tracked: April 21, 2026 at 02:00 AM
Classified by LLM (prompt v3) · confidence: 75%