DLA CAGE Office revoking DUNS+4 numbers for SB

This is new to me:

Contractors have to register with dnb.com for a DUNS number in order to register in SAM, which is required in order to get a government contract.

CCR, and now SAM, allow an entity with a single DUNS to add 4-digit suffixes ("DUNS+4") to create multiple accounts within CCR/ SAM for different contracts.

DUNS+4 can help businesses segregate funds and manage contracts.

A small business was recently contacted by DLA, who assigns CAGE Codes, and was told that they could no longer use the DUNS+4 numbers that they registered in CCR.

Each DUNS+4 number gets a separate CAGE Code, and DLA is rationing these Codes - after they were already issued.

This SB has a current Kt awarded through CCR using an old DUNS+4, and now has to get the CO to mod the Kt to show their basic DUNS (without the "+4" extension) and corresponding CAGE Code.

Separately,

they also have an offer pending with a different agency that was submitted using another DUNS+4, and I advised them that they need to notify the PCO to change both DUNS and CAGE.

The DUNS+4 and associated CAGE Code that were put on the SF-1449 no longer show up in SAM.

Why is DLA doing this ?

Are they running low on electrons ?