Upgrade failed from 7.2.3-6705 to 7.2.4/7.6.0-1978

Following couchbase cappella cluster upgrade failed -
from ami- couchbase-cloud-server-7.2.3-6705-x86_64-v1.0.24
to ami - couchbase-cloud-server-7.6.0-1978-x86_64-v1.0.27

server logs -
https://cb-engineering.s3.amazonaws.com/aman/collectinfo-2024-01-08T095240-ns_1%40svc-dqisea-node-002.nyya3cj0c19wc-w.sandbox.nonprod-project-avengers.com.zip

https://cb-engineering.s3.amazonaws.com/aman/collectinfo-2024-01-08T095240-ns_1%40svc-dqisea-node-004.nyya3cj0c19wc-w.sandbox.nonprod-project-avengers.com.zip

https://cb-engineering.s3.amazonaws.com/aman/collectinfo-2024-01-08T095240-ns_1%40svc-dqisea-node-005.nyya3cj0c19wc-w.sandbox.nonprod-project-avengers.com.zip

https://cb-engineering.s3.amazonaws.com/aman/collectinfo-2024-01-08T095240-ns_1%40svc-dqisea-node-006.nyya3cj0c19wc-w.sandbox.nonprod-project-avengers.com.zip

 the following error can be seen repeatedly in the server logs - 
Analytics Service unable to successfully rebalance 631ced739606914a8025160ae54444b2 due to 'java.lang.IllegalStateException: timed out waiting for all nodes to join & cluster active (missing nodes: [b83e58572e35aa9d5cf1b607c04f4e55], state: UNUSABLE)'; see analytics_info.log for details

??corresponding AV can be found here - https://couchbasecloud.atlassian.net/browse/AV-70281??