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 ('b9e4fb821eaec469d683f129794db069', -1, 1711639908, 1711639908, '36522c95', -7, 0, 0)

Line : 187
File : sessions.php