Message Oracle PLS-00114 - identifier string too long

ERRORidentifier string too long
CAUSEThe name of a PL/SQL variable is longer than 30 characters. Legal identifiers (including quoted identifiers) have a maximum length of 30 characters. A string literal might have been mistakenly enclosed in double quotes instead of single quotes, in which case PL/SQL considers it a quoted identifier.
ACTIONShorten the identifier.