A duplicate "oracle.manageddataaccess.client" section is defined

webapi local debugging is normal
error will be reported when published on IIS

HTTP  500.19 - Internal Server Error


       0x800700b7
       "oracle.manageddataaccess.client" 

:
    8:     <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
    9:     <section name="oracle.manageddataaccess.client" type="OracleInternal.Common.ODPMSectionHandler, Oracle.ManagedDataAccess, Version=4.121.2.0, Culture=neutral, PublicKeyToken=89b483f429c47342" />**
   10:     <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->

Line 9 red

reference
https://support.microsoft.com.
is useless

The symptoms of

and
http://blog.darkthread.net/po.
are almost the same

there is no corresponding solution