phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '78fdc6050e8a7fab937719125de247c9' 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 ('78fdc6050e8a7fab937719125de247c9', -1, 1778671725, 1778671725, 'd849d815', -2, 0, 0)

Line : 187
File : sessions.php