phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '51508f03061f5426a84df16080753537' for key 'PRIMARY'

INSERT INTO sub_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('51508f03061f5426a84df16080753537', -1, 1768280674, 1768280674, 'd849d83d', -4, 0, 0)

Line : 187
File : sessions.php