MSCRM 2016 OnPrem Solution-Upgrade Deadlock with existing Solution-Patch - dynamics-crm

Question

This is my situation:
in my MSCRM 2016 On-Prem Version I have 3 Types of Solutions for the same, I will call it, Base-Solution.
These are:
IWO_CRM (V2.3.0.0) -> Base-Solution
IWO_CRM_Patch_... (V2.3.1.0) -> Contains a Workflow that was quickly needed
IWO_CRM_Upgrade (V2.4.0.2) -> Newly imported Base-Solution for Upgrade
These are all Managed Solutions.
Normally I would just Upgrade and would get a beautiful IWO_CRM (V2.4.0.2)
But Murphy faceslapped me and denied!
My Problem now is:
I can't run the Upgrade because it can't find all entitys contained in the Base-Solution.
The error log states, that the Workflow from the Patch-Solution is missing.
But I can't merge the Base-Solution with the Patch-Solution without using the Upgrade-Solution.
I can't uninstall the Patch or Upgrade Solution, when I try i get the Error that an Entity could not be found.
And while everything is in this mess, I'm unsure of what should I do or could I do.
Here an overview of the different Errors:
Try to Upgrade the Solution
Unhandled Exception: System.ServiceModel.FaultException`1[[Microsoft.Xrm.Sdk.OrganizationServiceFault, Microsoft.Xrm.Sdk, Version=8.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]]: workflow With Id = db73b25c-c714-46d0-9d05-d3d19a33e82a Does Not ExistDetail:
<OrganizationServiceFault xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://schemas.microsoft.com/xrm/2011/Contracts">
<ActivityId>3d3042f4-a52b-47d4-a93f-871e1904526e</ActivityId>
<ErrorCode>-2147220969</ErrorCode>
<ErrorDetails xmlns:d2p1="http://schemas.datacontract.org/2004/07/System.Collections.Generic" />
<Message>workflow With Id = db73b25c-c714-46d0-9d05-d3d19a33e82a Does Not Exist</Message>
<Timestamp>2019-09-05T08:24:15.968578Z</Timestamp>
<ExceptionRetriable>false</ExceptionRetriable>
<ExceptionSource i:nil="true" />
<InnerFault i:nil="true" />
<OriginalException i:nil="true" />
<TraceText i:nil="true" />
</OrganizationServiceFault>
Try to delete the Upgrade-Solution
Unhandled Exception: System.ServiceModel.FaultException`1[[Microsoft.Xrm.Sdk.OrganizationServiceFault, Microsoft.Xrm.Sdk, Version=8.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]]: All entities must be found.Detail:
<OrganizationServiceFault xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://schemas.microsoft.com/xrm/2011/Contracts">
<ActivityId>ef3e6030-5d3f-43b7-a202-c82584b7f15a</ActivityId>
<ErrorCode>-2147220970</ErrorCode>
<ErrorDetails xmlns:d2p1="http://schemas.datacontract.org/2004/07/System.Collections.Generic" />
<Message>All entities must be found.</Message>
<Timestamp>2019-09-05T08:48:57.9558391Z</Timestamp>
<ExceptionRetriable>false</ExceptionRetriable>
<ExceptionSource i:nil="true" />
<InnerFault i:nil="true" />
<OriginalException i:nil="true" />
<TraceText i:nil="true" />
</OrganizationServiceFault>
Try to delete the Patch-Solution (Looks truly like the first Error)
Unhandled Exception: System.ServiceModel.FaultException`1[[Microsoft.Xrm.Sdk.OrganizationServiceFault, Microsoft.Xrm.Sdk, Version=8.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]]: workflow With Id = db73b25c-c714-46d0-9d05-d3d19a33e82a Does Not ExistDetail:
<OrganizationServiceFault xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://schemas.microsoft.com/xrm/2011/Contracts">
<ActivityId>7b9f6465-df4d-44af-8497-c706bd9fee5b</ActivityId>
<ErrorCode>-2147220969</ErrorCode>
<ErrorDetails xmlns:d2p1="http://schemas.datacontract.org/2004/07/System.Collections.Generic" />
<Message>workflow With Id = db73b25c-c714-46d0-9d05-d3d19a33e82a Does Not Exist</Message>
<Timestamp>2019-09-05T08:50:25.7216539Z</Timestamp>
<ExceptionRetriable>false</ExceptionRetriable>
<ExceptionSource i:nil="true" />
<InnerFault i:nil="true" />
<OriginalException i:nil="true" />
<TraceText i:nil="true" />
</OrganizationServiceFault>
I realy hope that this is enough information to picture my problem.
Any help is appreciated.
Thank's everyone