Partner & does not exist for venture & equity group &

What causes this issue?

Partner &v1& is not defined as a JVA-partner for venture &v2& and
equitygroup &v3&.

System Response

How to fix this error?

Check the owner-partners in the equity group (on the JOA-level). If
necessary, create a new equity group with partner &v1& as an owner and
assign this equity group to ownership of venture &v2&. Alternatively,
you may choose to post to a partner who is already in equity group
&v3&.

Error message extract from SAP system. Copyright SAP SE.