The error “Vendor already exists” means that you’re trying to add a new, but there’s already a vendor in the system with the same name.
To fix this:
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Check for duplicates: Look if the vendor you’re trying to add is already in the system.
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Use different details: If it’s a different vendor, try using a different name or mobile number.
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Update existing vendor: If it’s the same vendor, please edit their existing information instead of creating a new one.