phpBB : Critical Error

Error creating new session

DEBUG MODE

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

INSERT INTO docttorrdiscluc_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('121408c526fcdad79d6df2c90786f3c9', -1, 1545133669, 1545133669, '12d45dea', -4, 0, 0)

Line : 190
File : sessions.php