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 ('0aa4dcb3975e6f9ba5bc42143c1016df', -1, 1526997684, 1526997684, '36a2a3b5', 14, 0, 0)

Line : 187
File : sessions.php