phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'ce1c8acf77945b1fce6b719cd90ee0ae' 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 ('ce1c8acf77945b1fce6b719cd90ee0ae', -1, 1534796624, 1534796624, '36e137ae', 4, 0, 0)

Line : 187
File : sessions.php