Describe the bug
Replica nodes crash with segmentation fault when processing FT.DROPINDEX commands replicated from primary nodes. The crash occurs in VM_GetModuleUserFromUserName
during ACL permission checking, causing replicas to terminate and disrupting cluster operations.

To Reproduce
create index on primary -> drop that index -> the replica that replays ft.DROP crashes

Expected behavior
A clear and concise description of what you expected to happen.

Environment

FT.DROPINDEX should replicate cleanly to all replica nodes without crashes.

• Valkey Search Module Version
• Valkey Core Version

Additional context