when I am working on creating a multiple list content types with same column names suddenly I got a message while trying to create "The Column name that you entered is already in use or reserved choose another name" as shown in the screen shot below
Copy the code and paste in browser, where ever we got the issue->Hit Enter
Now we can able to see the same message, click ok
Finally keep the script same in the browser and click Ok to create a column.
Now we are able to create columns with same if another content type without any issues.
Please let me know, if any one facing the same issue.