phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '6a6a68ed1d995eafde1be9b56191b954' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('6a6a68ed1d995eafde1be9b56191b954', -1, 1770459782, 1770459782, 'd849d876', 5, 0, 0)

Line : 187
File : sessions.php