phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'f78ec4f9e4ec021a14ff8526aef08ffa' 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 ('f78ec4f9e4ec021a14ff8526aef08ffa', -1, 1728202591, 1728202591, '12756398', 5, 0, 0)

Line : 187
File : sessions.php