Are you posting from a mobile phone ? Just wondering about the garbage under your post.
It is better if you post a screenshot like this to show the settings you are using.
However, a very short checklist.
1) Make sure brush dynamics is off.
2) It is possible to paint using a pattern, which might be a single colour. Make sure Source is set to Image.
3) There is a drop down menu for alignment: None / Aligned / Registered / Fixed My guess is, you are on fixed. Use None or Aligned.
see: https://docs.gimp.org/2.10/en/gimp-tool-clone.html
It is better if you post a screenshot like this to show the settings you are using.
However, a very short checklist.
1) Make sure brush dynamics is off.
2) It is possible to paint using a pattern, which might be a single colour. Make sure Source is set to Image.
3) There is a drop down menu for alignment: None / Aligned / Registered / Fixed My guess is, you are on fixed. Use None or Aligned.
see: https://docs.gimp.org/2.10/en/gimp-tool-clone.html