phpBB : Critical Error

Error creating new session

DEBUG MODE

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

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('3ef81874a42b0ac34bf03bff7d3f6765', -1, 1542655346, 1542655346, '36dd4b44', -1032, 0, 0)

Line : 193
File : sessions.php