phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'fffcbd1c27c8c1a1c0d25f1e303b6367' 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 ('fffcbd1c27c8c1a1c0d25f1e303b6367', -1, 1766167898, 1766167898, 'd849d8d7', -4, 0, 0)

Line : 187
File : sessions.php