postgres sql 9.3 to 94.14 from 9.2 to 9.4 upgrade failed, as part of the Apigee upgrade from 4.16.05 to 4.17.09

[systemunix]

unable to upgrade postgres sql when we are upgrading Apigee edge from 4.16.05 to 4.17.09. below is the error logs

LOG: skipping missing configuration file "/opt/apigee/data/apigee-postgresql/pgdata/postgresql.auto.conf" 2017-10-30 16:18:53 UTC [79008]: [2-1] user= db= host= FATAL: database files are incompatible with server 2017-10-30 16:18:53 UTC [79008]: [3-1] user= db= host= DETAIL: The data directory was initialized by PostgreSQL version 9.3, which is not compatible with this version 9.4.14.