我的dockerfile曾经成功地构建。
我今天尝试使用docker build -t fv .进行构建（成功构建5天后），但一直收到以下错误：

failed commit on ref "layer-sha256:7a3de07a56633b9096304d02c47f097f3e28ae6c6dd442d1e7c4d26452ecd90a": "layer-sha256:7a3de07a56633b9096304d02c47f097f3e28ae6c6dd442d1e7c4d26452ecd90a" failed size validation: 581433721 != 600361569: failed precondition

这意味着什么以及如何纠正？
我停靠文件是：

FROM rocker/verse

ENV DEBIAN_FRONTEND=noninteractive
RUN apt-get update && apt-get install -y --no-install-recommends build-essential libpq-dev python3.8 python3-pip python3-setuptools python3-dev
RUN pip3 install --upgrade pip

ADD . ./home/rstudio

ADD requirements.txt .
ADD install_packages.r .

# Miniconda and dependencies
RUN cd /tmp/ && \
        wget https://repo.anaconda.com/miniconda/Miniconda3-latest-Linux-x86_64.sh && \
        bash Miniconda3-latest-Linux-x86_64.sh -b -p $HOME/miniconda3 && \
        /root/miniconda3/condabin/conda install -y python=3.7
ENV PATH=$PATH:/root/miniconda3/bin

#RUN npm install phantomjs-prebuilt --phantomjs_cdnurl=http://cnpmjs.org/downloads

# installing python libraries
RUN pip3 install -r requirements.txt

# installing r libraries
RUN Rscript install_packages.r

我得到另一个推荐是：

=> => sha256:7a3de07a56633b9096304d02c47f097f3e28ae6c6dd442d1e7c4d26452ecd90a 580.97MB / 600.36MB                                                                                                                                   1150.8s
------
 > [ 1/10] FROM docker.io/rocker/verse@sha256:3b417b991a32cc8bf9c1fa173ec976a5cc65522a76918df61b5c6cf6261e63a5:

这是否是因为提取的基础映像存在问题？