diff --git a/PadelClubDataTests/SyncDataAccessTests.swift b/PadelClubDataTests/SyncDataAccessTests.swift
index 63b82cb..63bf5ab 100644
--- a/PadelClubDataTests/SyncDataAccessTests.swift
+++ b/PadelClubDataTests/SyncDataAccessTests.swift
@@ -548,10 +548,10 @@ struct SyncDataAccessTests {
         let matchColA: SyncedCollection<Match> = await tourStoreA.asyncLoadingSynchronizedCollection()
         let teamScoreColA: SyncedCollection<TeamScore> = await tourStoreA.asyncLoadingSynchronizedCollection()
 
-        let tr1 = TeamRegistration()
+        let tr1 = TeamRegistration(tournament: tournament.id)
         let pr11 = PlayerRegistration(teamRegistration: tr1.id, firstName: "f1", lastName: "l1")
         let pr12 = PlayerRegistration(teamRegistration: tr1.id, firstName: "f2", lastName: "l2")
-        let tr2 = TeamRegistration()
+        let tr2 = TeamRegistration(tournament: tournament.id)
         let pr21 = PlayerRegistration(teamRegistration: tr2.id, firstName: "f21", lastName: "l21")
         let pr22 = PlayerRegistration(teamRegistration: tr2.id, firstName: "f22", lastName: "l22")
 
@@ -569,7 +569,11 @@ struct SyncDataAccessTests {
         
         try await StoreCenter.main.setAuthorizedUsersAsync(for: tournament, users: [userId2])
 
-        let _ = try await self.storeCenterB.testSynchronizeOnceAsync()
+        let data = try await self.storeCenterB.testSynchronizeOnceAsync()
+        let syncData = try SyncData(data: data, storeCenter: self.storeCenterB)
+        
+        #expect(syncData.shared.count == 1)
+        
         let tournamentColB: SyncedCollection<Tournament> = await self.storeCenterB.mainStore.asyncLoadingSynchronizedCollection()
         
         #expect(tournamentColB.count == 1)
@@ -588,6 +592,82 @@ struct SyncDataAccessTests {
         
     }
     
+    @Test func testMatchSharingThenTournamentDelete() async throws {
+        guard let userId1 = StoreCenter.main.userId else {
+            throw TestError.notAuthenticated
+        }
+        guard let userId2 = self.storeCenterB.userId else {
+            throw TestError.notAuthenticated
+        }
+
+        // Setup tournament
+        let tournamentColA: SyncedCollection<Tournament> = await StoreCenter.main.mainStore.asyncLoadingSynchronizedCollection()
+        
+        let tournament = Tournament(name: "test_data_access_children")
+        tournament.relatedUser = userId1
+        try await tournamentColA.addOrUpdateAsync(instance: tournament)
+        
+        let tourStoreA = try StoreCenter.main.store(identifier: tournament.id)
+        let teamRegColA: SyncedCollection<TeamRegistration> = await tourStoreA.asyncLoadingSynchronizedCollection()
+        let playerRegColA: SyncedCollection<PlayerRegistration> = await tourStoreA.asyncLoadingSynchronizedCollection()
+        let roundColA: SyncedCollection<Round> = await tourStoreA.asyncLoadingSynchronizedCollection()
+        let matchColA: SyncedCollection<Match> = await tourStoreA.asyncLoadingSynchronizedCollection()
+        let teamScoreColA: SyncedCollection<TeamScore> = await tourStoreA.asyncLoadingSynchronizedCollection()
+
+        let tr1 = TeamRegistration(tournament: tournament.id)
+        let pr11 = PlayerRegistration(teamRegistration: tr1.id, firstName: "f1", lastName: "l1")
+        let pr12 = PlayerRegistration(teamRegistration: tr1.id, firstName: "f2", lastName: "l2")
+        let tr2 = TeamRegistration(tournament: tournament.id)
+        let pr21 = PlayerRegistration(teamRegistration: tr2.id, firstName: "f21", lastName: "l21")
+        let pr22 = PlayerRegistration(teamRegistration: tr2.id, firstName: "f22", lastName: "l22")
+
+        try await teamRegColA.addOrUpdateAsync(contentOfs: [tr1, tr2])
+        try await playerRegColA.addOrUpdateAsync(contentOfs: [pr11, pr12, pr21, pr22])
+        
+        let round = Round(tournament: tournament.id)
+        let match = Match(round: round.id)
+        let ts1 = TeamScore(match: match.id, team: tr1)
+        let ts2 = TeamScore(match: match.id, team: tr2)
+        
+        try await roundColA.addOrUpdateAsync(instance: round)
+        try await matchColA.addOrUpdateAsync(instance: match)
+        try await teamScoreColA.addOrUpdateAsync(contentOfs: [ts1, ts2])
+        
+        try await StoreCenter.main.setAuthorizedUsersAsync(for: match, users: [userId2])
+
+        let data = try await self.storeCenterB.testSynchronizeOnceAsync()
+        let syncData = try SyncData(data: data, storeCenter: self.storeCenterB)
+        
+        #expect(syncData.shared.count == 1)
+
+        let tournamentColB: SyncedCollection<Tournament> = await self.storeCenterB.mainStore.asyncLoadingSynchronizedCollection()
+        
+        #expect(tournamentColB.count == 1)
+
+        let tourStoreB = try self.storeCenterB.store(identifier: tournament.id)
+        let matchColB: SyncedCollection<Match> = await tourStoreB.asyncLoadingSynchronizedCollection()
+        let playerRegColB: SyncedCollection<PlayerRegistration> = await tourStoreB.asyncLoadingSynchronizedCollection()
+        let teamRegColB: SyncedCollection<TeamRegistration> = await tourStoreB.asyncLoadingSynchronizedCollection()
+
+        #expect(matchColB.count == 1)
+        #expect(playerRegColB.count == 4)
+        #expect(teamRegColB.count == 2)
+
+        try await tournamentColA.deleteAsync(instance: tournament)
+        
+        #expect(tournamentColA.count == 0)
+
+        let data2 = try await self.storeCenterB.testSynchronizeOnceAsync()
+        let syncData2 = try SyncData(data: data2, storeCenter: self.storeCenterB)
+        
+        #expect(syncData2.deletions.count > 0)
+
+        #expect(matchColB.count == 0)
+        #expect(playerRegColB.count == 0)
+        #expect(teamRegColB.count == 0)
+
+    }
+    
     // needs to run on a postgreSQL, otherwise fails because of sqlite database locks
     @Test func testDataAccessForChildren() async throws {