Reason:
Monitored endpoint uses SNMp v3 'Authentication passphrase' and 'Privacy passphrase' 255 characters length and it's can't be changed. (McAfee ESM

Steps to reproduce:
Change 'Authentication passphrase' and 'Privacy passphrase' fields in Items allowed length from 64 characters to at least 255 characters.

Expected:

In the process of filling Authentication passphrase' and 'Privacy passphrase' fields for SNMPv3 item be able to put 255 characters row.