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			 Groupie 
			
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				Destination "uuid" in Search & Replace Metdata dialog
			 
			
			
			By accident (here a nicer word for "mistake"  
		
	
		
		
		
		
		
		
		
		
		
		
	
	 ) I used "uuid" as Destination field in the Search & Replace Metadata dialog.What did this do? I cannot see any change. Where is this uuid column? Is my library now corrupt? Thanks for any help! --- Below a screen shot of the dialog how I applied it:  
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		#2 | 
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			 creator of calibre 
			
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			uuid is an internal identifier, it is used to, for example, match books in the library to books on the device. If you have a backup you should restore from it.
		 
		
	
		
		
		
		
		
		
		
		
		
		
	
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		#3 | 
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			 Groupie 
			
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			Thanks Kovid. Will do. 
		
	
		
		
		
		
		
		
		
		
		
		
	
	Just curious, can I view the uuid to a book somewhere? Can i map it to a column?  | 
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		#4 | 
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			 creator of calibre 
			
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			IIRC you can use the custom column with a template like {uuid}
		 
		
	
		
		
		
		
		
		
		
		
		
		
	
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			 null operator (he/him) 
			
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			Press 'I'  
		
	
		
		
		
		
		
		
		
		
		
		
	
	BR  | 
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		#6 | 
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			 Groupie 
			
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			 Resident Curmudgeon 
			
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		 Quote: 
	
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			 Grand Sorcerer 
			
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			Probably with an image editor to obfuscate the unimportant and possibly personal data. The pertinent bits, the source and destination fields, are clear.
		 
		
	
		
		
		
		
		
		
		
		
		
		
	
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		#9 | 
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			 Groupie 
			
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| Tags | 
| calibre library, columns, uuid | 
            
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