How can I resolve this error when saving collections

System Information
  • Strapi Version: 3.6.8
  • Operating System: Ubuntu
  • Database: PostgreSQL
  • Node Version: 14.18.0
  • NPM Version: N/A
  • Yarn Version: 1.22.15

I added a third-party plugin (Color Picker content type) to Strapi, however after updating a collection to include the new content type I started receiving the following error when updating or adding collections.

{"error":{"contentType":["contentType field has unspecified keys: pluginOptions"]}}

I removed the plugin and then deleted the new fields, however I still encountered the error even after clearing the cache and build directories. I then ran a search for the colorpicker content type and removed them from the source code, to no avail. Is there a way to fix this error?