To be able to upgrade to the latest version of Talkdesk for Salesforce, you will need to delete the following deprecated Apex classes from Talkdesk for Salesforce..
In order to do so, you will need a Salesforce Administrator access. Go to Setup > Custom Code > Apex Classes on your Salesforce org to delete them.
The table below contains the Apex Classes and the initial Talkdesk for Salesforce package version from which they were created.
| Apex Class Name | Package Version |
| SessionManager | 2.18 - 6.4 |
| UserRoleTriggerAPIService | 1.2 - 2.18 |
| LoginController | 1.2 - 2.23 |
| DebugService | 1.5 - 1.54 |
For more information, please see this Product Notice: Upgrade Talkdesk for Salesforce to Ensure Compatibility with ICU Locale Formats