@jai_patel_02 this can happen when you are joining without a condition, or on something that isn't unique (I'd imagine the values in your [Name] field aren't), which causes a Cartesian join and basically 'blows up' your data. Unless you have a specific use-case where you know you want a Cartesian join, these are usually performed by mistake and Alteryx's default way of handling these is to error and stop the workflow. You can override this and make Alteryx continue/warn you but still continue by changing the configuration under the 'Cartesian Joins:' dropdown in the Join Multiple tool. If you don't mean to do this then I'd recommend trying to join your data sources on something like a UniqueID if possible.
More info on this issue specifically for Alteryx: https://community.alteryx.com/t5/Alteryx-Designer-Knowledge-Base/N-Dimensional-Join-Errors/ta-p/3493...
