phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '1c406dbb3b9c48eff30588ebc1477d79' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('1c406dbb3b9c48eff30588ebc1477d79', -1, 1770064087, 1770064087, '0aff0001', 6, 0, 0)

Line : 199
File : sessions.php