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 ('ddbd66af7ab1b8b0ed8214ac16a549e6', -1, 1529368679, 1529368679, '36c6561c', 25, 0, 0)

Line : 187
File : sessions.php