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 ('9f6b697ee4e0f64f3de65294301b7900', -1, 1519481230, 1519481230, '36a099e9', 1, 0, 0)

Line : 187
File : sessions.php