phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 2

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('f66d8f854ab75d97f2743926a411b527', -1, 1553301017, 1553301017, '34c91bd3', 21, 0, 0)

Line : 189
File : sessions.php