Ctrl + k for insert mode character navigation broken by blink's na

[PyDataBlog]

My keymaps for navigating around a buffer in insert mode partially broken cos blink is using C-k for some fallback below

  -- insert mode: uses both snippet and insert commands
  for key, commands in pairs(keys_to_commands) do
    if #commands == 0 then goto continue end

    local fallback = require('blink.cmp.keymap.fallback').wrap('i', key)
    apply.set('i', key, function()
      if not require('blink.cmp.config').enabled() then return fallback() end

      for _, command in ipairs(commands) do
        -- special case for fallback
        if command == 'fallback' then
          return fallback()

          -- run user defined functions
        elseif type(command) == 'function' then
          if command(require('blink.cmp')) then return end

          -- otherwise, run the built-in command
        elseif require('blink.cmp')[command]() then
          return
        end
      end
    end)

here's my navigate keymaps:

keymap.set("i", "<C-b>", "<ESC>^i", { desc = "Move Beginning of line" }) -- move to the beginning of the line
keymap.set("i", "<C-e>", "<End>", { desc = "Move End of line" }) -- move to the end of the line
keymap.set("i", "<C-h>", "<Left>", { desc = "Move Left" }) -- move left
keymap.set("i", "<C-l>", "<Right>", { desc = "Move Right" }) -- move right
keymap.set("i", "<C-j>", "<Down>", { desc = "Move Down" }) -- move down
keymap.set("i", "<C-k>", "<Up>", { desc = "Move Up" }) -- move up

and my blink setup:

return {
	"saghen/blink.cmp",
	event = "InsertEnter",
	-- optional: provides snippets for the snippet source
	dependencies = {
		"rafamadriz/friendly-snippets",
		{
			"folke/lazydev.nvim",
			ft = "lua", -- only load on lua files
			opts = {
				library = {
					-- See the configuration section for more details
					-- Load luvit types when the `vim.uv` word is found
					{ path = "${3rd}/luv/library", words = { "vim%.uv" } },
				},
			},
		},
		{ "moyiz/blink-emoji.nvim" },
	},

	-- use a release tag to download pre-built binaries
	-- version = "*",
	-- AND/OR build from source, requires nightly: https://rust-lang.github.io/rustup/concepts/channels.html#working-with-nightly-rust
	build = "cargo +nightly build --release",
	-- If you use nix, you can build from source using latest nightly rust with:
	-- build = 'nix run .#build-plugin',

	---@module 'blink.cmp'
	---@type blink.cmp.Config
	opts = {
		-- 'default' for mappings similar to built-in completion
		-- 'super-tab' for mappings similar to vscode (tab to accept, arrow keys to navigate)
		-- 'enter' for mappings similar to 'super-tab' but with 'enter' to accept
		-- See the full "keymap" documentation for information on defining your own keymap.
		keymap = {
			preset = "enter",
			["<C-y>"] = { "select_and_accept" },

			["<C-e>"] = { "hide", "fallback" },
			["<CR>"] = { "accept", "fallback" },

			["<C-space>"] = { "show", "show_documentation", "hide_documentation" },

			["<Tab>"] = { "select_next", "snippet_forward", "fallback" },
			["<S-Tab>"] = { "select_prev", "snippet_backward", "fallback" },

			["<Up>"] = { "select_prev", "fallback" },
			["<Down>"] = { "select_next", "fallback" },
			["<C-p>"] = { "select_prev", "fallback" },
			["<C-n>"] = { "select_next", "fallback" },

			["<C-b>"] = { "scroll_documentation_up", "fallback" },
			["<C-f>"] = { "scroll_documentation_down", "fallback" },
		},
		completion = {
			accept = {
				auto_brackets = {
					enabled = true,
				},
			},
			documentation = {
				auto_show = true,
				auto_show_delay_ms = 200,
				window = {
					border = "rounded",
				},
			},
			menu = {
				draw = {
					treesitter = { "lsp" },
					columns = {
						{ "label", "label_description", gap = 1 },
						{ gap = 2, "kind_icon", "kind" },
					},
				},
				border = "rounded",
			},
			list = {
				selection = { preselect = true, auto_insert = true },
			},
			ghost_text = {
				enabled = false,
			},
		},
		signature = {
			enabled = true,
			window = {
				border = "rounded",
			},
		},

		appearance = {
			-- Sets the fallback highlight groups to nvim-cmp's highlight groups
			-- Useful for when your theme doesn't support blink.cmp
			-- Will be removed in a future release
			use_nvim_cmp_as_default = true,
			-- Set to 'mono' for 'Nerd Font Mono' or 'normal' for 'Nerd Font'
			-- Adjusts spacing to ensure icons are aligned
			nerd_font_variant = "normal",
		},
		-- Default list of enabled providers defined so that you can extend it
		-- elsewhere in your config, without redefining it, due to `opts_extend`
		sources = {
			default = { "lazydev", "lsp", "path", "snippets", "buffer", "emoji" },
			providers = {
				lazydev = {
					name = "LazyDev",
					module = "lazydev.integrations.blink",
					-- make lazydev completions top priority (see `:h blink.cmp`)
					score_offset = 100,
				},
				emoji = {
					module = "blink-emoji",
					name = "Emoji",
					score_offset = 15, -- Tune by preference
					opts = { insert = true }, -- Insert emoji (default) or complete its name
				},
			},
		},
	},
	opts_extend = { "sources.default" },
}

how do I get back to using C-k for upwards navigation in insert mode?

[PyDataBlog]

workaround I currently use:

			["<C-k>"] = { "fallback", "show_signature", "hide_signature" },