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 ('4442b1d53713b9c7fa6e5d43743a5eb2', -1, 1503407175, 1503407175, '36c46576', 17, 0, 0)

Line : 187
File : sessions.php