In DBZ-5072 the two properties that were added to the table of configuration options for the topic routing SMT were both assigned the same anchor ID (by-logical-table-router-logical-table-cache-size). The presence of the duplicate IDs results in the following error when building the Antora documentation:

asciidoctor: WARNING: topic-routing.adoc: line 201: id assigned to anchor already in use: by-logical-table-router-logical-table-cache-size