phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'c4d576cd1b0a35aeb209b048e2473a2e' 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 ('c4d576cd1b0a35aeb209b048e2473a2e', -1, 1542583950, 1542583950, '3690647b', -1, 0, 0)

Line : 187
File : sessions.php