Key 'Number' not found in '<Class Name>' when nullifying incoming links

[jhoanarango]

How frequently does the bug occur?

Sometimes

Description

The 'Crashlytics' from Firebase is showing a crash on my project which is happening to a few users. I have not been able to reproduce this myself.

I have an Object that takes care of handling all Realm operations such as saving and getting data. I use this object to save an object I call "EventTracker". EventTracker has a list of 'TrackedEvent' which it has 2 properties, an event ID and an ID, both of type strings. These keep track of events the user has with their calendar and their are added/deleted depending on the user downloaded content.

It's been hard to find what is causing this crash since I've done all kinds of modifications on my code and they come back with the same outcome.

Any idea as to what may cause this error?

Stacktrace & log output

Fatal Exception: RLMException
0  CoreFoundation                 0xecb28 __exceptionPreprocess
1  libobjc.A.dylib                0x2af78 objc_exception_throw
2  RealmSwift                     0x53c83c RLMThrowCollectionException(NSString*) + 101 (RLMResults.mm:101)
3  RealmSwift                     0x53e93c -[RLMResults deleteObjectsFromRealm] + 63 (RLMResults_Private.hpp:63)
4  RealmSwift                     0x535ef0 -[RLMRealm deleteObjects:] + 911 (RLMRealm.mm:911)
5  Crewline                       0x2d3c34 closure realm/realm-swift#2 in static RealmManager.saveLive(_:)
6  Crewline                       0x2e65e0 partial apply for closure realm/realm-swift#3 in static RealmManager.saveEventTracker(_:) (<compiler-generated>)
7  Crewline                       0x2dd570 partial apply for thunk for @callee_guaranteed () -> (@error @owned Error) (<compiler-generated>)
8  Crewline                       0x2e6a30 thunk for @callee_guaranteed () -> (@error @owned Error)partial apply
9  RealmSwift                     0x788dc Realm.write<A>(withoutNotifying:_:) + 265 (Realm.swift:265)
10 Crewline                       0x2d1674 static RealmManager.saveEventTracker(_:) + 78 (Extension-Realm.swift:78)
11 Crewline                       0x16c5e4 closure realm/realm-swift#1 in closure realm/realm-swift#1 in CalendarCollectionViewCell.downloadSchedule()
12 Crewline                       0x26c754 thunk for @escaping @callee_guaranteed @Sendable () -> () (<compiler-generated>)
13 libdispatch.dylib              0x213c _dispatch_call_block_and_release
14 libdispatch.dylib              0x3dd4 _dispatch_client_callout
15 libdispatch.dylib              0x125a4 _dispatch_main_queue_drain
16 libdispatch.dylib              0x121b8 _dispatch_main_queue_callback_4CF
17 CoreFoundation                 0x3751c __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__
18 CoreFoundation                 0x34218 __CFRunLoopRun
19 CoreFoundation                 0x33968 CFRunLoopRunSpecific
20 GraphicsServices               0x34e0 GSEventRunModal
21 UIKitCore                      0x22aedc -[UIApplication _run]
22 UIKitCore                      0x22a518 UIApplicationMain
23 Crewline                       0x310dc0 main + 17 (AppDelegate.swift:17)
24 ???                            0x1c83c2d84 (Missing)

Can you reproduce the bug?

No

Reproduction Steps

No response

Version

10.50.1

What Atlas Services are you using?

Local Database only

Are you using encryption?

No

Platform OS and version(s)

iOS

Build environment

Xcode version: 15.1 Dependency manager and version: SPM