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 ('6f2b8d7f6aabb08f0fb49e1cb1cad6a9', -1, 1487710696, 1487710696, '36c5b99d', 29, 0, 0)

Line : 189
File : sessions.php