Dynamic Data Mapping Web in System Settings are not saved after upgrade

• Type: Regression Bug
• Status: Verified
• Resolution: Unresolved
• Affects Version/s: 7.2.X, Master
• Fix Version/s: None
• Component/s: Dynamic Data Mapping > Upgrades
• Labels: None
• Fix Priority: 3

Steps to Reproduce:

1. Start 7.1.10 GA1.
2. Go to System Settings > Dynamic Data Mapping.
3. In Dynamic Data Mapping Web, do some changes, save.
4. Upgrade to master head.
5. Start master.
6. Go to System Settings and check the configurations.

Expected Results:
Configurations should be saved and same as before upgrade.

Actual Results:
Configurations display as the default, changes are not saved.

On 7.1.10 GA1, changes are saved in database table "Configuration_" with "configurationId":

com.liferay.dynamic.data.mapping.web.configuration.DDMWebConfiguration

On master, after I manually saved the configurations after upgrade and check the table, there are two more records with "configurationId":

com.liferay.dynamic.data.mapping.web.internal.configuration.DDMWebConfiguration

Reproduced on:
Upgrade From: 7.1.10 GA1.
Tomcat 9.0.17 + MySQL 5.7. Portal master GIT ID: 1c62e19b4ba305cc9b80bb11b7a8d0577690730e.
Tomcat 9.0.17 + MySQL 5.7. Portal 7.2.x-private GIT ID: cef3836ff77df4040f9eb64da351dbc9a7a051b5.