Sed and regex to match all number except as part of another pattern

I need to use sed to match replace number patterns, but only if they aren't part of something else. Example:

Input

echo "Execution error for request 40205911. JBO-12345: Reason: Expected meta model version with uuid '34a659f5-ad37-4fea-9593-95a1a818adbb', but retrieved meta model version with uuid '8a3de0d2-fcd9-4bfd-b4a7-070679dc0184'" 

sed file:

s/([0-9a-f]{9}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12})/########-####-####-####-############/g
s/[0-9]{5,8}/########/g
s/[0-9]/#/g

Desired output:

Execution error for request ########. JBO-12345: Reason: Expected meta model version with uuid '########-####-####-####-############', but retrieved meta model version with uuid '########-####-####-####-############'

But hat I am getting is:

Execution error for request ########. JBO-###: Reason: Expected meta model version with uuid '##a###f#-ad##-#fea-####-##a#a###adbb', but retrieved meta model version with uuid '#a#de#d#-fcd#-#bfd-b#a#-########dc####

I've some examples that describe (I think) what I need; a look ahead reference

Using sed

$ sed -E ":a;s/( |#)[0-9]|('[^,]*)[[:alnum:]]/#/;ta;" input_file
Execution error for request ########. JBO-12345: Reason: Expected meta model version with uuid '########-####-####-####-############', but retrieved meta model version with uuid '########-####-####-####-############'

Create a label a to branch back to if a substitution is successful when the pattern:

space followed by an integer

hash # followed by an integer

A single quote ' up to a comma removing all alphanumeric characters in between

is found then replace with a # hash each time a match is found.