phpBB : Critical Error

Error creating new sessions

DEBUG MODE

SQL Error : 1062 Duplicate entry '7755fdd6e76c5df07956f045c3264108' for key 1

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('7755fdd6e76c5df07956f045c3264108', -1, 1508311716, 1508311716, '36e0c5fb', -1, 0, 0)

Line : 187
File : sessions.php