计划'；python'；收到一个X窗口系统错误

我一直在为一个小程序创建一个GUI界面，以便在数据库中存储书籍。 一般来说，一切正常，但当我点击“添加按钮”时，在操作执行后，程序关闭，我可以在终端上读取：

The program 'python' received an X Window System error.

This probably reflects a bug in the program.
The error was 'BadWindow (invalid Window parameter)'.
(Details: serial 4916 error_code 3 request_code 15 minor_code 0)
(Note to programmers: normally, X errors are reported asynchronously;
that is, you will receive the error a while after causing it.
To debug your program, run it with the --sync command line
option to change this behavior. You can then get a meaningful
backtrace from your debugger if you break on the gdk_x_error() function.)

我真的不明白这是什么样的错误。我正确地使用Tkinter库来创建GUI（窗口、按钮、表单、表格…）

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