phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '3120a07d9bba6bc30c182d0b616b7bf5' for key 'phpbb_sessions.PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('3120a07d9bba6bc30c182d0b616b7bf5', -1, 1768750639, 1768750639, 'd849d879', -4, 0, 0)

Line : 187
File : sessions.php