phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '278e7e6da8ce871652fb9ed993d0ba4a' 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 ('278e7e6da8ce871652fb9ed993d0ba4a', -1, 1769018774, 1769018774, 'd849d8ad', 1, 0, 0)

Line : 187
File : sessions.php