phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '78e4e8ac4f4c6344278ad2fc3d377c15' for key 'phpbb_sessions.PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('78e4e8ac4f4c6344278ad2fc3d377c15', -1, 1752626931, 1752626931, 'd849d801', 9, 0, 0)

Line : 187
File : sessions.php