phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'be1c621aa50b5fd4285361043eb30a74' 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 ('be1c621aa50b5fd4285361043eb30a74', -1, 1490235623, 1490235623, '369e5075', 11, 0, 0)

Line : 187
File : sessions.php