**Describe the bug** Genetate duplicated css in dev mode **To Reproduce** I could provide a repository if you need. **Screenshots** ```html <div p="t-10">This is a WindiCss Demo</div> ``` it's ok when first render.  then I change `p="t-10"` to `p="t-15"`, it's still ok  but when I change `p="t-15"` back to `p="t-10"`, code for `p="t-10"` is duplicated. 