BUG: Organizations field gets infilled with null

## 🐛 Bug Report Organizations field gets infilled with null

### What went wrong? 🤔
In production when someone was creating an event they infilled 'organization' filled somehow with null.
This broke view with a list of created events and possibly other things as well

### Expected Behavior
When creating an event 'organizations' field shouldn't be able to be null

### Actual Behavior
When creating an event 'organizations' field got filled with null

### Steps to Reproduce Issue

### Solution

### Environment

#### Operating System

#### Browser

### Screenshots

No file, test, or reproduction steps are provided. Start by reproducing event creation with an empty organization value, then trace the event-creation flow and the created-events view. Done means an organization cannot be stored as null and the events list renders correctly.

Written by the indexing model from the issue text.