What should I do if they are all called TP5?

Question

There is already a file named tp5 in the first section. What should I do if this section is tp5? I changed it to tp6 and the structure reported an error.

Warning: require(D:\myphp_www \PHPTutorial\WWW\tp6\public/../thinkphp/base.php): failed to open stream: No such file or directory in D:\myphp_www\PHPTutorial\WWW\tp6\public\index.php on line 16

Fatal error: require(): Failed opening required 'D:\myphp_www\PHPTutorial\WWW\tp6\public/../thinkphp/base.php' (include_path='.;C:\php\pear ') in D:\myphp_www\PHPTutorial\WWW\tp6\public\index.phpon line 16