Android webview android.database.sqlite.SQLiteException：table passwordtb已经存在

Question

在我们的SDK中，我们使用webview加载广告。一位开发人员向我们提供了日志 ，

Fatal Exception: android.database.sqlite.SQLiteException: table passwordtb already exists (code 1)
       at android.database.sqlite.SQLiteConnection.nativeExecuteForChangedRowCount(SQLiteConnection.java)
       at android.database.sqlite.SQLiteConnection.executeForChangedRowCount(SQLiteConnection.java:743)
       at android.database.sqlite.SQLiteSession.executeForChangedRowCount(SQLiteSession.java:754)
       at android.database.sqlite.SQLiteStatement.executeUpdateDelete(SQLiteStatement.java:64)
       at android.database.sqlite.SQLiteDatabase.executeSql(SQLiteDatabase.java:1706)
       at android.database.sqlite.SQLiteDatabase.execSQL(SQLiteDatabase.java:1635)
       at com.android.org.chromium.android_webview.PasswordDatabase.createTable(PasswordDatabase.java:149)
       at com.android.org.chromium.android_webview.PasswordDatabase.initDatabase(PasswordDatabase.java:140)
       at com.android.org.chromium.android_webview.PasswordDatabase.initOnBackgroundThread(PasswordDatabase.java:108)
       at com.android.org.chromium.android_webview.PasswordDatabase.access$000(PasswordDatabase.java:13)
       at com.android.org.chromium.android_webview.PasswordDatabase$1.run(PasswordDatabase.java:92)

我想知道为什么会这样。