Server Bug Fix: Getting black background after I merging two clipped Rasters in QGIS

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So I clipped two rasters and tried to merge them but every time I merge them I’m getting a black rectangle background that I don’t want. Tried clipping again with the shapefile but getting a black square background. I’m a newbie to QGIS(recently shifted from ArcGIS) and skimmed through the documentation once and don’t know how to fix this. Here’s some screenshot and the data I’m using:

https://drive.google.com/drive/folders/1TRnWRs4qCylupBmxNMdvkf1zlzu3QFfV?usp=sharing

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It looks like your No Data values are getting lost in the merge. Look in the properties of the layer for the no data value. -200 in your case (non a no data value I am used to seeing)
no data in properties
Then set the no data in the output to the same. (-200)
merge algo no data output

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