David Hobbs looks at How to correct errors in the PM00400 keys master table in MS Dynamics GP.
How to correct errors in the PM00400 keys master table in MS Dynamics GP. | MS Dynamics GP
Payables & ReceivablesSQL & DataInstall, Upgrade & Admin
Archived post from 2012. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.