Unable to read data from paper book after app upgrade

[aashreys]

Here's the unobfuscated stack trace. Could you offer any insight into why this might be happening?

Process: com.aashreys.walls.release, PID: 10063
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.aashreys.walls.release/com.aashreys.walls.ui.StreamActivity}: io.paperdb.PaperDbException: Couldn't read/deserialize file /data/user/0/com.aashreys.walls.release/files/collections_book/type_unsplash_collection767186.pt for table type_unsplash_collection767186
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2665)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726)
        at android.app.ActivityThread.-wrap12(ActivityThread.java)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477)
        at android.os.Handler.dispatchMessage(Handler.java:102)
        at android.os.Looper.loop(Looper.java:154)
        at android.app.ActivityThread.main(ActivityThread.java:6119)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
     Caused by: io.paperdb.PaperDbException: Couldn't read/deserialize file /data/user/0/com.aashreys.walls.release/files/collections_book/type_unsplash_collection767186.pt for table type_unsplash_collection767186
        at io.paperdb.DbStoragePlainFile.readTableFile(DbStoragePlainFile.java:268)
        at io.paperdb.DbStoragePlainFile.readTableFile(DbStoragePlainFile.java:257)
        at io.paperdb.DbStoragePlainFile.readTableFile(DbStoragePlainFile.java:235)
        at io.paperdb.DbStoragePlainFile.select(DbStoragePlainFile.java:147)
        at io.paperdb.Book.read(Book.java:67)
        at com.aashreys.walls.persistence.a.b.b(CollectionRepositoryImpl.java:82)
        at com.aashreys.walls.ui.q.a(StreamActivityModel.java:67)
        at com.aashreys.walls.ui.StreamActivity.j(StreamActivity.java:108)
        at com.aashreys.walls.ui.StreamActivity.o(StreamActivity.java:40)
        at com.aashreys.walls.ui.d.onCreate(BaseActivity.java:54)
        at com.aashreys.walls.ui.StreamActivity.onCreate(StreamActivity.java:61)
        at android.app.Activity.performCreate(Activity.java:6679)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2618)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726) 
        at android.app.ActivityThread.-wrap12(ActivityThread.java) 
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477) 
        at android.os.Handler.dispatchMessage(Handler.java:102) 
        at android.os.Looper.loop(Looper.java:154) 
        at android.app.ActivityThread.main(ActivityThread.java:6119) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776) 
     Caused by: com.esotericsoftware.kryo.KryoException: java.lang.IllegalArgumentException: field com.aashreys.walls.domain.display.collections.UnsplashCollection.id has type com.aashreys.walls.domain.c.b, got com.aashreys.walls.domain.c.a
    Serialization trace:
    id (com.aashreys.walls.domain.display.collections.UnsplashCollection)
    mContent (io.paperdb.PaperTable)
        at com.esotericsoftware.kryo.serializers.ObjectField.read(ObjectField.java:144)
        at com.esotericsoftware.kryo.serializers.CompatibleFieldSerializer.read(CompatibleFieldSerializer.java:147)
        at com.esotericsoftware.kryo.Kryo.readObject(Kryo.java:734)
        at com.esotericsoftware.kryo.serializers.ObjectField.read(ObjectField.java:125)
        at com.esotericsoftware.kryo.serializers.FieldSerializer.read(FieldSerializer.java:540)
        at com.esotericsoftware.kryo.Kryo.readObject(Kryo.java:712)
        at io.paperdb.DbStoragePlainFile.readTableFile(DbStoragePlainFile.java:248)
        	... 22 more
     Caused by: java.lang.IllegalArgumentException: field com.aashreys.walls.domain.display.collections.UnsplashCollection.id has type com.aashreys.walls.domain.c.b, got com.aashreys.walls.domain.c.a
        at java.lang.reflect.Field.set(Native Method)
        at com.esotericsoftware.kryo.serializers.ObjectField.setField(ObjectField.java:54)
        at com.esotericsoftware.kryo.serializers.ObjectField.read(ObjectField.java:137)
        	... 28 more

[aashreys]

Nvm, I've fixed this. I had not configured proguard properly due to which Paper was unable to find the proper classes.