Saving pdf's with highlights and annotations

I am using adobe acrobat reader. I want to save my pdf file in adobe acrobat after making a bunch of annotations (using the drawing pen) and highlights, but it keeps asking me "save as" instead of "save". Every time I use the ctrl+s command, or even after deliberately going to the menu and selecting the "save" option, it just asks me to "save as", which means it is not allowing me to simply over-write on my pdf and asking me to "save as" the pdf as a new pdf. In that case, I would already have 1000s of pdfs on my system. This is such an inconvenience! Just to give you some actual tested data, when I earlier used MS Edge for editing using their in-build recently launched editing function, it was a simple one step ctrl+s and done! Much easier! Why does adobe want me to - first ctrl+s, then go to file location, the save the file in that same folder, then windows asks me "do you want to replace the file in the destination" and then click on yes. What a stupidity! And then when I google my problem, then I get some weird - "go to preferences, do this do that nonsense". If anybody from the adobe team is reading this, then please inform to your seniors regarding this and get it solved. If there exists a temporary solution, the please provide.