2625781 - Unable to connect multiple SAP Cloud Connectors to a subaccount on SAP BTP

When checking sub-account status from SCC -> "Connector", you perceive it's not connected, and it keeps on failure status.

Upon selecting the sub-account itself from SCC -> <sub-account name from the left menu>, similar error below is raised.

Unable to connect: A different cloud connector instance with the same value for location ID is already connected to this subaccount

Finally, from SCC trace (ljs_trace.log (<2.17)/scc_core.trc (>=2.17) brings the following:

#ERROR#com.sap.core.connectivity.tunnel.core.handlers.TunnelClientErrorHandler#tunnel-client-678-4# #Unexpected problem during tunnel processing in channel [id: XXXXXXXXXX, L:0.0.0.0/0.0.0.0:61020 ! R:aws-eu-de.accounts.ondemand.com/X.XX.XX.XXX:443]; Reason: Invalid status of handshake response: 400 Invalid Upgrade Request; Exception type: com.sap.core.connectivity.tunnel.core.handshake.TunnelHandshakeException
202X-XX-XX XX:XX:XX,XXX +0200#ERROR#com.sap.scc.rt#https-jsse-nio2-8443-exec-5# #Tunnel account:///XXXXXXXXXX connect failed
com.ap.core.connectivity.tunnel.core.handshake.ClientConflictHandshakeException: Invalid status of handshake response: 409 Conflict

• SAP Cloud Connector release independent;
• SAP BTP Cloud Platform.

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