phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '87d2a2936bfdf26f2640a05a8f04607a' 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 ('87d2a2936bfdf26f2640a05a8f04607a', -1, 1770392534, 1770392534, 'd849d88f', -4, 0, 0)

Line : 187
File : sessions.php