Expressions 'Not uniquely defined at this level'

Hello!

When I create an expression (regardless App or Connector) and try to call it, there is an error “Not uniquely defined at this level”
What means and how can I solve this? There is no hints or explanations about this.

Thanks

Hi,
This warning will show up when you are using a lookup or aggregate expression. You will need to set the level for which records this expression needs to be calculated and you need to use the functions applicable for the aggregates and lookups. More information can be found in the sections about aggregates and lookups in the Academy.

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