> ## Documentation Index
> Fetch the complete documentation index at: https://docs.cognite.com/llms.txt
> Use this file to discover all available pages before exploring further.

# ReverseConnectionContainerMissing validation rule

> Validates that the container holding the direct connection property (used in a reverse connection) exists. Ensures the connection can be persisted.

This rule checks that the container holding the direct connection property (used in reverse connection) exists.

## Why it matters

The direct connection property must be stored in a container.
If the container doesn't exist, the connection cannot be persisted.

## Example

If `WindTurbine.windFarm` maps to container `WindTurbine`, but this container doesn't exist,
the reverse connection from `WindFarm` cannot function.

## Further reading

* [Validation rules](/cdf/deploy/neat/validation/index)