How to handle multiple values under the same tag?

**Have you read the documentation?** - [ ] Yes, but it does not include related information regarding my question. - [ ] Yes, but the steps described in the documentation do not work on my machine. - [x] Yes, but I am having difficulty understanding it and want clarification. **You are setting up traggo in** - [x] Docker - [ ] Linux native platform - [ ] Windows native platform **Describe your problem** I'd like to add multiple values under the same tag. For example, I'm using a tag `pets`, and I can only tag one pet at a time. How is this scenario expected to be handled? **Any errors, logs, or other information that might help us identify your problem** The UI shows "Tag X is already defined" when trying to add the same tag with a different value