# Update an Insights Model Relation

You cannot use `PUT` or `PATCH` to modify an Insights model relation. Instead, delete the existing relation and recreate it with the updated definition.

For example, suppose data model `A` currently relates `table1` and `table2` on the `id` column. After retrieving the relation ID (see [Get a List of Data Model Relations](/products/customer-data-platform/treasure-insights/reference-insights-model-endpoints)), you can add `table3` to the relation by:

1. Deleting the existing relation.
2. Creating a new relation that includes all three tables.


For the API endpoint, select the appropriate [endpoint for your region](https://api-docs.treasuredata.com/en/overview/aboutendpoints/).


```bash
curl -X DELETE https://<api endpoint>/reporting/datamodels/xxxxxx/relations/yyyyyy \
-H 'authorization: TD1 xxxx/xxxxxxxxxxxxxx' \
-H 'accept: application/json'
```


```bash
curl -v -X POST https://<api endpoint>/reporting/datamodels/xxxxxx/relations \
-H 'authorization: TD1 xxxx/xxxxxxxxxxxxxx' \
-H 'cache-control: no-cache' \
-H 'accept: application/json' \
-H 'content-type: application/json' \
-d '{
  "definition": [
    {"dataset": "ds1", "table": "table1", "column": "name"},
    {"dataset": "ds1", "table": "table2", "column": "name"},
    {"dataset": "ds2", "table": "table3", "column": "name"}
  ]
}'
```