How To Fix SWDP_WB_TOOL221 - Mapping for root node &1 not possible

SAP Error Message - Details

• Message type: E = Error

• Message class: SWDP_WB_TOOL - Web Dynpro: Messages for Workbench Tools

• Message number: 221

• Message text: Mapping for root node &1 not possible

What causes this issue?

You want to define mapping for the root node of a context. This is not
possible.

System Response

The system rejects the operation and permits special cases only:
If the mapping original is
A node for which no mapping is defined or
A node that is not the child node of a node and for which mapping is
defined
then the system copies the original node to create a new node that is a
direct child node of the context's root node and then defines mapping
between the two of them.

How to fix this error?

Root nodes cannot be used as originals for mapping, and mapping may only
be defined for root nodes in the cases described above.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.