While having a storage connection with a wrong password for CHAP authentication, adding a new LUN with the right password will create a new storage connection in the DB with the right password.
Verified using rhev 3.5.1 vt14
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://rhn.redhat.com/errata/RHSA-2015-0888.html