mongo:7 can't open data files written by mongo:8 (exit code 62 =
NeedsDowngrade). Stay on mongo:8 — the SIGSEGV was caused by the
--wiredTigerCacheSizeGB=0.25 flag, not the version. Removing the flag
is the actual fix.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>