Define table keys for entry &1 &2

What causes this issue?

You have included the line
R3TR &V1& &V2&
in the object list by hand. As a result, entries in table &V2& will be
included in the request or task.

How to fix this error?

You can only save your changes after you have maintained the keys of
the table entries you want to include in the request or task. You can
access key maintenance with <LS>Goto</> -> <LS>Object key</> or by
double-clicking on the corresponding entry in the object list.
<ZH>Note</>
If you want to include all the entries in table &V2&, keep in mind that
all the contents of table &V2& will be overwritten in the target
system.
In particular, all the entries that do not exist in the source system
will be deleted in the target system.
To include all entries in table &V2&, select the function <LS>Extras</>
-> <LS>Change object function</>, or in key maintenance enter an
asterisk at the first position "*" .

Error message extract from SAP system. Copyright SAP SE.