phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'cb23b93356449cdb9f94a8c2f4e3ac25' 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 ('cb23b93356449cdb9f94a8c2f4e3ac25', -1, 1524290793, 1524290793, '3650738c', -2, 0, 0)

Line : 187
File : sessions.php