Thanks PwC. I unchecked "Vendor Change on Invoice" to prevent this problem in the future. Can anyone tell me if there's a way to get rid of the Integrity error? I have a bunch of new errors in POA Integrity Check today after deleting some obsolete item codes. Can we get rid of the errors?? Rebuild is greyed out and not available. Please help.

1-PO 00001218 has a critical error: IC Item ZZ10Y13S does not exist.
1-PO 00001221 has a critical error: IC Item ZZEX6141R does not exist.
1-PO 00001298 has a critical error: IC Item ZZEX6141R does not exist.
1-PO 00001632 has a critical error: IC Item ZZCARDREADER does not exist.
2-RC 00002089 has a critical error: IC Item ZZEX6141R does not exist.
2-RC 00002159 has a critical error: IC Item ZZCARDREADER does not exist.
2-RC 00002300 has a critical error: IC Item ZZEX6141R does not exist.
2-RC 00002300 has a critical error: IC Item ZZEX5920 does not exist.
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