phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '88ca0403aa13021006a4829ef9038d3f' 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 ('88ca0403aa13021006a4829ef9038d3f', -1, 1771859538, 1771859538, 'd849d890', 1, 0, 0)

Line : 187
File : sessions.php