phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '88378411178ebdfd9c4f1f34cf7607e2' 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 ('88378411178ebdfd9c4f1f34cf7607e2', -1, 1768010358, 1768010358, '0aff0001', 74, 0, 0)

Line : 199
File : sessions.php