When user attempts to change admin password to the same one in the:
Customers Control panel > Account > Admins
error message appears:
"is the same as the old oneThe new password cannot be accepted. The entered value is the same as one of the 5 previous passwords. Please, provide another password."
It is caused by the internal issue PBA-57878, fixed in the version 5.5.7 of the PBA-E.
It is recommended to update PBA-E to at least 5.5.7 version.