HI MAMAOUI,
if you have a Search Head Cluster, you have to deploy apps using deployer
https://docs.splunk.com/Documentation/Splunk/7.0.0/DistSearch/PropagateSHCconfigurationchanges
in few words, you have to copy your apps to deploy in Deployer's $SPLUNK_HOME/etc/shcluster/ and then Push the configuration bundle running the command
./splunk apply shcluster-bundle -target <URI>:<management_port> -auth <username>:<password>
if you want to preserve lookups of the other apps you have to use
splunk apply shcluster-bundle -target <URI>:<management_port> -preserve-lookups true -auth <username>:<password>
Bye.
Giuseppe
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