Ok, I was using FOMM to create my merged patch and got the following error message after it finished

"Warning: Record [LVLI:0017B7BB] in file FalloutNV.esm is being overridden by record [REFR:0017B7BB] in file Fallout New Vegas Merged Patch.esp.
Assertion failure (P:\BethWorkbench\wbImplementation.pas, line 4414)"

Hmm, haven't seen this before in creating a merged patch in either FO3 or FOVN.

Can anyone tell me what this means? Thanks.