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 ('dc4fefb8bc6f5f41ebbe8dbdc1a6c3de', -1, 1552936924, 1552936924, '00000000', 2, 0, 0)

Line : 172
File : sessions.php