If you using older/custom code and don't want to update, check out this section I made changes to:
https://github.com/EQEmu/Server/blob...ket.cpp#L12235
Hopefully, your issue is bound to that snippet and the change will fix it, or at least stop the server from crashing.
If this does fix the crash and you are still having 'transaction' issues, post back any new results..otherwise, let me know
if this does fix it.