POA 8.1A (091029)

We had a Receipt to the wrong vendor in POA, so we changed the Vendor (POA allows this) and posted the Invoice using the right Vendor. Now we have this error in POA's Integrity Check:

2-RC 00002340 has critical error: Actual number of vendors found not equal to number stored in the header file. This data may be corrupt

"Rebuild" is not available (greyed out).

1. Is there a way to get rid of this error?

2. If changing the Vendor causes a Critical error can you disable this ability in POA?