some columns do not appear in hover if using labels overrides already used common names in Plotly Express

Should we raise a warning or an error in the following case (which is very contrived of course)

import plotly.express as px
df = px.data.tips()
fig = px.scatter(df, x='tip', y='total_bill', color='day', facet_col='sex',
                 labels={'tip':'sex', 'day':'sex'})
fig.show()

in this case, in the hover only the value corresponding to x='tip' appears.

首先运行 issue 中的 Plotly Express scatter 示例，并检查 labels 映射如何影响 hover 字段。确定冲突的 labels 应该产生警告还是错误，然后在确定预期行为后，为示例中的情况补充覆盖测试。