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 ('9e9e8d5c7d02cb7aabe3be08df3c23f0', -1, 1513177144, 1513177144, '36a33d42', -1, 0, 0)

Line : 187
File : sessions.php