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 ('17d725d2d074bba18cc0e2b5e1b25cee', -1, 1501022719, 1501022719, '369c2041', 15, 0, 0)

Line : 187
File : sessions.php