How to Block a Supplier for a Single B2B Item Until a Specific Date

Hello Experts,

We have a single Back‑to‑Back (B2B), non‑stocked item that is normally sourced from Supplier X.
Supplier X has notified us that they cannot supply this specific item until 01‑Mar‑2026 due to a supply chain disruption.

Important constraints:

This availability issue applies to one item only, not the entire supplier relationship.
The item is B2B, so the supply source is determined by GOP → SCO, not inventory.

We want Planning/GOP to avoid this supplier until 01‑Mar‑2026, then allow sourcing again after this date.

Thanks in advance,

Sam.