No need to use @SuppressLint("NewApi") when @ChecksSdkIntAtLeast is used.

matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/util/BuildVersionSdkIntProvider.kt

@@ -34,4 +34,7 @@ interface BuildVersionSdkIntProvider {
             result()
         } else null
     }
+
+    @ChecksSdkIntAtLeast(parameter = 0)
+    fun isAtLeast(version: Int) = get() >= version
 }

vector/src/main/java/im/vector/app/features/pin/lockscreen/crypto/LockScreenKeysMigrator.kt

@@ -36,14 +36,13 @@ class LockScreenKeysMigrator @Inject constructor(
     /**
      * Performs any needed migrations in order.
      */
-    @SuppressLint("NewApi")
     suspend fun migrateIfNeeded() {
         if (legacyPinCodeMigrator.isMigrationNeeded()) {
             legacyPinCodeMigrator.migrate()
             missingSystemKeyMigrator.migrateIfNeeded()
         }
 
-        if (systemKeyV1Migrator.isMigrationNeeded() && versionProvider.get() >= Build.VERSION_CODES.M) {
+        if (systemKeyV1Migrator.isMigrationNeeded() && versionProvider.isAtLeast(Build.VERSION_CODES.M)) {
             systemKeyV1Migrator.migrate()
         }
     }