Hi Sachin
Check if there is any standard text maintained
SAP Supplier Relationship Management under SRM Server Cross-Application Basic Settings Text Schema >> Define Text Types >>Define Text Schema >>Define Fixed Values for Texts
Refer link below
Notes - Purchasing Documents - SAP Library
Alos as pointed by Franz they could actually be copying it from an old cart.
Can you try to see if the text being shown is always the same or does it vary?
Regards
Vinita