I recently purchased a new Mac Pro and have been trying to back it up on my Time Capsule for the first time.  However, it says there is no available disk space. This time capsule was used with my old Mac Pro that had a Home vault open on it.

The time capsule was used with my prior Mac Pro laptop that unfortunately had the home vault active on it.
My new Mac Book Pro does not have home vault open.  But I am unable to back up my new MAC pro laptop because it says there is not enough storage space available.  Therefore, t there any way to just completely delete all the old backup data out of my Time Capsule from my prior Mac Laptop? 
When I go into the time capsule - it shows me NOTHING as being in the backup datas.  So, I don't know where to begin to delete all the old data off the
time Capsule and start with a completely empty machine. 

Therefore, t there any way to just completely delete all the old backup data out of my Time Capsule from my prior Mac Laptop?
Here is how to do this:
Open Macintosh HD > Applications > Utilities > AirPort Utility
Click Manual Setup
Click the Disks icon at the top of the AirPort Utility window
Click the Disks tab below the icons
Click Erase
The "Quick Erase" option will only take a moment or two
Now you can backup your MacBook Pro. If you connect an Ethernet cable from the MBP to one of the LAN <-> ports on the TC, the first backup will go 3-5 times faster than wireless.
Once you have the first backup done, you can use wireless for subsequent backups since they will only take a few minutes

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