分配颜色后，二维绘图标记颜色无法更改

Question

我有以下 MWE 来生成图。可以观察到图“path2”的球颜色仍然是蓝色（必须是红色），即使标记颜色被分配为“红色”。因此，我需要更改红线中绘制的“path2”的球颜色。

\documentclass[varwidth=true]{standalone}
\usepackage{pgfplots}
\begin{document}
    \begin{tikzpicture}
        \begin{axis}[xlabel=Distance from center, ylabel=Appointment,xlabel={Follow-ups},
            xlabel style={yshift=-5mm},
            xtick={1,2,3,4,5,6,7,8,9,10},
            xticklabels = {
                \strut A1,
                \strut A2,
                \strut A3,
                \strut A4,
                \strut A5,
                \strut A6,
                \strut A7,
                \strut A8,
                \strut A9,
                \strut A10
            },
            x tick label style={text width=5em,anchor=north,align=center}, 
            ymin=0,
            ymax=20,
            grid style=dashed, 
            legend style={
                at={(0.738,0.8209)},
                anchor=south west,
            },]
            \addplot[color=blue, mark=ball, mark color=blue] coordinates{(1,6.5)(2,11)(3,17.4)(4,11)(5,17.4)(6,6.5)(7,17.4)(8,6.5)(9,11)(10,11)};
        \addplot[color=red, mark=ball, mark color=red]  coordinates{(1,5.9)(2,9.5)(3,13.4)(4,8.5)(5,13.7)(6,6)(7,14.3)(8,5.3)(9,9.2)(10,9.4)};
            \legend{path, path2}
        \end{axis}
    \end{tikzpicture} 
\end{document}

Answer 1

\documentclass[varwidth=true]{standalone}
\usepackage{pgfplots}
\pgfplotsset{compat=1.18}
\begin{document}
    \begin{tikzpicture}
        \begin{axis}[xlabel=Distance from center, ylabel=Appointment,xlabel={Follow-ups},
            xlabel style={yshift=-5mm},
            xtick={1,2,3,4,5,6,7,8,9,10},
            xticklabels = {
                \strut A1,
                \strut A2,
                \strut A3,
                \strut A4,
                \strut A5,
                \strut A6,
                \strut A7,
                \strut A8,
                \strut A9,
                \strut A10
            },
            x tick label style={text width=5em,anchor=north,align=center}, 
            ymin=0,
            ymax=20,
            grid style=dashed, 
            legend style={
,                at={(0.738,0.8209)},
                anchor=south west,
            },]
          \addplot[color=blue, mark=ball, mark color=blue] coordinates{(1,6.5)(2,11)(3,17.4)(4,11)(5,17.4)(6,6.5)(7,17.4)(8,6.5)(9,11)(10,11)};
        \addplot[red,mark=ball,mark options={ball color=red}]  coordinates{(1,5.9)(2,9.5)(3,13.4)(4,8.5)(5,13.7)(6,6)(7,14.3)(8,5.3)(9,9.2)(10,9.4)};
            \legend{path, path2}
        \end{axis}
    \end{tikzpicture} 
\end{document}