phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1114 The table 'phpbb_sessions' is full

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('e6ffbd0c06885bac2ed569510e9d9e78', -1, 1508666955, 1508666955, '36a298e8', 4, 0, 0)

Line : 187
File : sessions.php