Issue in the API while merging the two data frames

Hi to all,

I have two data frames in the python django API.one dataframe we are getting from the query and one data frame we are getting the XL file.how I want map this dataframes.in this equipment name and tag name are common.while merging one tag is missing or it is going to be updated with another tag in that dataframe repetition is happening.while giving conditions like how = right or left or inner or outer the tag is missing and this tag is going to update by the another tag and this tag is coming as twice. How can I solve this?

Please suggest me solution.

Thanks and Regards.

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