phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '6123ac3cf71a99cde162d85aea1f0aef' 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 ('6123ac3cf71a99cde162d85aea1f0aef', -1, 1771753637, 1771753637, 'd849d890', 6, 0, 0)

Line : 187
File : sessions.php