3172890 - Why was my session terminated for security reasons? (IP address discrepancy)

Why am I being logged out of the Ariba system with the following security warning error message:

Ariba had to terminate your current session for security reasons because we have identified a discrepancy in your current IP address from the IP address used in previous requests. Please return to the Ariba Login page and log in again to reset your session credentials.

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Ariba Network all versions ; Ariba Procurement, cloud edition all versions ; Ariba Sourcing, cloud edition all versions ; SAP Ariba Procurement, cloud edition all versions ; SAP Ariba Sourcing, cloud edition all versions ; SAP Business Network for Procurement and SAP Business Network for Supply Chain all versions

IP address error, IP address issue , KBA , migration source: knowledge@ariba , error messages , supplier account login , warning messages , migrated on: 2022-04-02 14:20:12 , buyer account login , BNS-ARI-PCP-SEC , Encryption, Key Management Service, GBaaS,File Fortification , BNS-ARI-SS , Strategic Sourcing , BNS-ARI-SC , Strategic Contracts , BNS-ARI-INV , Invoicing , BNS-ARI-SIPM , Supplier Information & Performance Management , BNS-ARI-CM , Catalog Management , BNS-ARI-SV , Spend Visibility , SBN-AN , SAP Business Network for Procurement & Supply Chain , SBN-AN-DISC , Discovery & Sourcing/Contract Punchout Scenario , BNS-ARI-CP-CORE-UM , Core Administration User Management , Problem