Multiple entries with same key error

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Mọi người xem giúp mình sửa lỗi “Multiple entries with same key”
Cám ơn mọi người nhiều !!!

public class Ex {

    private static final Log LOG = AutoLog.getLog();

    static Ex ex = new Ex();

    public static void main(String[] args) throws IOException, TException, UnknownWordException {
        System.out.println("Test Word2Vec: ");
        ex.loadModel();
    }

    public void interact(Searcher searcher) throws IOException, UnknownWordException {
        try (BufferedReader br = new BufferedReader(new InputStreamReader(System.in))) {
            while (true) {
                System.out.print("Enter word or sentence (EXIT to break): ");
                String word = br.readLine();
                if (word.equals("EXIT")) {
                    break;
                }
                List<Match> matches = searcher.getMatches(word, 20);
                System.out.println(Strings.joinObjects("
", matches));
            }
        }
    }

    public void loadModel() throws IOException, TException, UnknownWordException {
        Word2VecModel model;
        try (ProfilingTimer timer = ProfilingTimer.create(LOG, "Loading model")) {
            String json = Common.readFileToString(new File("D:\DT\aaa.model"));
            model = Word2VecModel.fromThrift(ThriftUtils.deserializeJson(new Word2VecModelThrift(), json));
        }
        ex.interact(model.forSearch());
    }

}

Run -> Lỗi
Exception in thread “main” java.lang.IllegalArgumentException: Multiple entries with same key: ??=3000 and ??=2000
at com.google.common.collect.ImmutableMap.checkNoConflict(ImmutableMap.java:136)
at com.google.common.collect.RegularImmutableMap.checkNoConflictInKeyBucket(RegularImmutableMap.java:98)
at com.google.common.collect.RegularImmutableMap.fromEntryArray(RegularImmutableMap.java:84)
at com.google.common.collect.ImmutableMap$Builder.build(ImmutableMap.java:295)
at com.medallia.word2vec.SearcherImpl.(SearcherImpl.java:27)
at com.medallia.word2vec.SearcherImpl.(SearcherImpl.java:31)
at com.medallia.word2vec.Word2VecModel.forSearch(Word2VecModel.java:62)
at com.medallia.word2vec.Ex.loadModel(Ex.java:55)
at com.medallia.word2vec.Ex.main(Ex.java:31)