Overlap in CIDR

**Describe the bug**
There are some vnet's which got created with overlap CIDR ranges, and we can see both CIDRs are makred as associated as well.
**To Reproduce**
Steps to reproduce the behavior:
Not sure how to reproduce this as this is not permanent issue

**Expected behavior**
CIDRs shouldn't be overlapped atleast once those are associated to an existing vnets. Reservations shouldn;t evn provide those ranges

**Screenshots**

⚠️ Found 5 overlap(s): just adding one here for security reason

OVERLAP DETECTED:
VNet 1: ***
Address Spaces: 10.43.2.192/26

VNet 2: ***
Address Spaces: 10.43.2.192/28

Overlapping CIDRs:
- 10.43.2.192/26 <-> 10.43.2.192/28

**Additional context**
We have observed this behaviour for few vnets as mentioned above.