Legend according to colours of the bars

I am trying to plot the values of items coming from multiple questionnaires. I successfully color-coded the bars according to which questionnaire the item belongs to, however, I am struggling to add a legend that can corresponds to the colour labelling. I tried using legend(), but it keeps telling me "Warning: Ignoring extra legend entries" and gave me only the first legend entry correctly (see screenshot)

arrays stores the name of the datasets I am looping through. The 2nd column of each array is the value i am plotting and 7th column of the array indicates which questionnaire the item is from (1-6).

questionnaire = {'A', 'B', 'C', 'D', 'E', 'F'};
for i = 1:numel(arrays)
    subplot(4, 1, i);
    values = arrays{i}(:, 2);
    b= bar(values,'FaceColor','flat');
    cmap = getColor(arrays{i}(:, 7));
    b.CData= cmap;
    yline(.3)
    yline(-.3)
    b= legend(questionnaire,'Location','northeastoutside');
end
function color = getColor(values)
% Define colors based on the values in column 7
unique_values = unique(values);
num_unique = numel(unique_values);
colormap_lines = lines(num_unique);
[~, index] = ismember(values, unique_values);
color = colormap_lines(index, :);
end

Answer 1

[Walter Roberson]

questionnaire = {'A', 'B', 'C', 'D', 'E', 'F'};

for i = 1:numel(arrays)
    subplot(4, 1, i);
    values = arrays{i}(:, 2);
    b = bar(values,'FaceColor','flat');
    cmap = getColor(arrays{i}(:, 7));
    b.CData= cmap;
    yline(.3)
    yline(-.3)
    H = gobjects(numel(questionnaire),1);
    for K = 1 : numel(questionnaire);
        H(K) = line(nan, nan, 'DisplayName', questionnaire{K}, 'Color', cmap(K,:));
    end
    legend(H,'Location','northeastoutside');
end

function color = getColor(values)
% Define colors based on the values in column 7
    unique_values = unique(values);
    num_unique = numel(unique_values);
    colormap_lines = lines(num_unique);
    [~, index] = ismember(values, unique_values);
    color = colormap_lines(index, :);
end