phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '42ff27a8492810623fc50d9f4b6aeb1c' 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 ('42ff27a8492810623fc50d9f4b6aeb1c', -1, 1788646822, 1788646822, 'c0a81013', 1, 0, 0)

Line : 187
File : sessions.php