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 ('61ae782f87b4106ac778def5b2cb4599', -1, 1532296249, 1532296249, '36c66fb9', 2, 0, 0)

Line : 187
File : sessions.php