Hello Saxena, Ankit,
As Vinod suggested, the error indicates that the property 'collectionName' is not specified in your pipeline. This property is required for the pipeline to run correctly.
You can resolve this issue by specifying the value of the 'collectionName' property in your pipeline configuration.
You can look at the document below to understand the pipeline parameters and variables in ADF
https://learn.microsoft.com/en-us/azure/data-factory/concepts-parameters-variables
In case, if this didn't resolve, please provide us with more details to assist you further.
I hope this helps.