phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '767a691ec6d31f2caceb691a1f560d87' 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 ('767a691ec6d31f2caceb691a1f560d87', -1, 1770200474, 1770200474, 'd849d8b9', 2, 0, 0)

Line : 187
File : sessions.php