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 ('efe8f2ef5bddefc2e4223d3ef692f9fe', -1, 1511422455, 1511422455, '36a16c9e', 14, 0, 0)

Line : 187
File : sessions.php