phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '0ce4c3adf5fe1647acd23c28ea6066ed' for key 1

INSERT INTO phpbb2_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('0ce4c3adf5fe1647acd23c28ea6066ed', -1, 1498349217, 1498349217, '36a2d3aa', 14, 0, 0)

Line : 187
File : sessions.php