phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '3766f2998e61bd3f5d431e5edbee55a5' 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 ('3766f2998e61bd3f5d431e5edbee55a5', -1, 1519232569, 1519232569, '36c49118', 6, 0, 0)

Line : 187
File : sessions.php