diff --git a/lib/src/androidTest/kotlin/at/bitfire/ical4android/AndroidCalendarTest.kt b/lib/src/androidTest/kotlin/at/bitfire/ical4android/AndroidCalendarTest.kt
index 669de0c2..a9d5e1d8 100644
--- a/lib/src/androidTest/kotlin/at/bitfire/ical4android/AndroidCalendarTest.kt
+++ b/lib/src/androidTest/kotlin/at/bitfire/ical4android/AndroidCalendarTest.kt
@@ -125,4 +125,4 @@ class AndroidCalendarTest {
         }
     }
 
-}
+}
\ No newline at end of file
diff --git a/lib/src/main/kotlin/at/bitfire/ical4android/AndroidCalendar.kt b/lib/src/main/kotlin/at/bitfire/ical4android/AndroidCalendar.kt
index f7ec09ed..1981dc9b 100644
--- a/lib/src/main/kotlin/at/bitfire/ical4android/AndroidCalendar.kt
+++ b/lib/src/main/kotlin/at/bitfire/ical4android/AndroidCalendar.kt
@@ -165,6 +165,8 @@ abstract class AndroidCalendar<out T: AndroidEvent>(
 
     var ownerAccount: String? = null
 
+    var syncId: String? = null
+
 
     /**
      * Sets the calendar properties ([name], [displayName] etc.) from the passed argument,
@@ -186,6 +188,8 @@ abstract class AndroidCalendar<out T: AndroidEvent>(
         isVisible = info.getAsInteger(Calendars.VISIBLE) != 0
 
         ownerAccount = info.getAsString(Calendars.OWNER_ACCOUNT)
+
+        syncId = info.getAsString(Calendars._SYNC_ID)
     }
 
 
diff --git a/lib/src/main/kotlin/at/bitfire/ical4android/JtxCollection.kt b/lib/src/main/kotlin/at/bitfire/ical4android/JtxCollection.kt
index 7e926d7a..c87b5a3d 100644
--- a/lib/src/main/kotlin/at/bitfire/ical4android/JtxCollection.kt
+++ b/lib/src/main/kotlin/at/bitfire/ical4android/JtxCollection.kt
@@ -60,6 +60,8 @@ open class JtxCollection<out T: JtxICalObject>(val account: Account,
     var supportsVTODO = true
     var supportsVJOURNAL = true
 
+    var syncId: Long? = null
+
     var context: Context? = null
 
 
@@ -85,6 +87,8 @@ open class JtxCollection<out T: JtxICalObject>(val account: Account,
         supportsVJOURNAL = values.getAsString(JtxContract.JtxCollection.SUPPORTSVJOURNAL) == "1"
                 || values.getAsString(JtxContract.JtxCollection.SUPPORTSVJOURNAL) == "true"
 
+        syncId = values.getAsLong(JtxContract.JtxCollection.SYNC_ID)
+
         this.context = context
     }
 
diff --git a/lib/src/main/kotlin/at/bitfire/ical4android/TaskProvider.kt b/lib/src/main/kotlin/at/bitfire/ical4android/TaskProvider.kt
index 7a2c02a1..eb00267f 100644
--- a/lib/src/main/kotlin/at/bitfire/ical4android/TaskProvider.kt
+++ b/lib/src/main/kotlin/at/bitfire/ical4android/TaskProvider.kt
@@ -22,14 +22,14 @@ class TaskProvider private constructor(
 ): Closeable {
 
     enum class ProviderName(
-            val authority: String,
-            val packageName: String,
-            val minVersionCode: Long,
-            val minVersionName: String,
-            private val readPermission: String,
-            private val writePermission: String
+        val authority: String,
+        val packageName: String,
+        val minVersionCode: Long,
+        val minVersionName: String,
+        private val readPermission: String,
+        private val writePermission: String
     ) {
-        JtxBoard("at.techbee.jtx.provider", "at.techbee.jtx", 207000001, "2.07.00", PERMISSION_JTX_READ, PERMISSION_JTX_WRITE),
+        JtxBoard("at.techbee.jtx.provider", "at.techbee.jtx", 210000000, "2.10.00", PERMISSION_JTX_READ, PERMISSION_JTX_WRITE),
         TasksOrg("org.tasks.opentasks", "org.tasks", 100000, "10.0", PERMISSION_TASKS_ORG_READ, PERMISSION_TASKS_ORG_WRITE),
         OpenTasks("org.dmfs.tasks", "org.dmfs.tasks", 103, "1.1.8.2", PERMISSION_OPENTASKS_READ, PERMISSION_OPENTASKS_WRITE);
 
diff --git a/lib/src/main/kotlin/at/techbee/jtx/JtxContract.kt b/lib/src/main/kotlin/at/techbee/jtx/JtxContract.kt
index 3707a005..31ea075f 100644
--- a/lib/src/main/kotlin/at/techbee/jtx/JtxContract.kt
+++ b/lib/src/main/kotlin/at/techbee/jtx/JtxContract.kt
@@ -46,7 +46,7 @@ object JtxContract {
     const val AUTHORITY = "at.techbee.jtx.provider"
 
     /** The version of this SyncContentProviderContract */
-    const val VERSION = 7
+    const val VERSION = 8
 
     /** Constructs an Uri for the Jtx Sync Adapter with the given Account
      * @param [account] The account that should be appended to the Base Uri
@@ -1215,6 +1215,12 @@ object JtxContract {
          */
         const val LAST_SYNC = "lastsync"
 
+        /**
+         * Purpose:  This column/property stores a sync_id for the given collection
+         * See https://github.com/TechbeeAT/jtxBoard/issues/1635
+         * Type: [Long]
+         */
+        const val SYNC_ID = "sync_id"
     }